diff options
Diffstat (limited to 'docs/configuration/firewall')
| -rw-r--r-- | docs/configuration/firewall/bridge.rst | 42 | ||||
| -rw-r--r-- | docs/configuration/firewall/flowtables.rst | 52 | ||||
| -rw-r--r-- | docs/configuration/firewall/general.rst | 1471 | ||||
| -rw-r--r-- | docs/configuration/firewall/global-options.rst | 117 | ||||
| -rw-r--r-- | docs/configuration/firewall/groups.rst | 210 | ||||
| -rw-r--r-- | docs/configuration/firewall/index.rst | 188 | ||||
| -rw-r--r-- | docs/configuration/firewall/ipv4.rst | 1145 | ||||
| -rw-r--r-- | docs/configuration/firewall/ipv6.rst | 1167 | ||||
| -rw-r--r-- | docs/configuration/firewall/zone.rst | 22 |
9 files changed, 2913 insertions, 1501 deletions
diff --git a/docs/configuration/firewall/bridge.rst b/docs/configuration/firewall/bridge.rst new file mode 100644 index 00000000..4a0dc3bb --- /dev/null +++ b/docs/configuration/firewall/bridge.rst @@ -0,0 +1,42 @@ +:lastproofread: 2023-11-08 + +.. _firewall-configuration: + +############################# +Bridge Firewall Configuration +############################# + +.. note:: **Documentation under development** + +******** +Overview +******** + +In this section there's useful information of all firewall configuration that +can be done regarding bridge, and appropiate op-mode commands. +Configuration commands covered in this section: + +.. cfgcmd:: set firewall bridge ... + +From main structure defined in :doc:`Firewall Overview</configuration/firewall/index>` +in this section you can find detailed information only for the next part +of the general structure: + +.. code-block:: none + + - set firewall + * bridge + - forward + + filter + - name + + custom_name + +Traffic which is received by the router on an interface which is member of a +bridge is processed on the **Bridge Layer**. A simplified packet flow diagram +for this layer is shown next: + +.. figure:: /_static/images/firewall-bridge-packet-flow.png + +For traffic that needs to be forwared internally by the bridge, base chain is +is **forward**, and it's base command for filtering is ``set firewall bridge +forward filter ...`` diff --git a/docs/configuration/firewall/flowtables.rst b/docs/configuration/firewall/flowtables.rst new file mode 100644 index 00000000..cd813298 --- /dev/null +++ b/docs/configuration/firewall/flowtables.rst @@ -0,0 +1,52 @@ +:lastproofread: 2023-11-08 + +.. _firewall-flowtables-configuration: + +################################ +Flowtables Firewal Configuration +################################ + +.. note:: **Documentation under development** + +******** +Overview +******** + +In this section there's useful information of all firewall configuration that +can be done regarding flowtables + +.. cfgcmd:: set firewall flowtables ... + +From main structure defined in :doc:`Firewall Overview</configuration/firewall/index>` +in this section you can find detailed information only for the next part +of the general structure: + +.. code-block:: none + + - set firewall + * flowtable + - custom_flow_table + + ... + + +Flowtables allows you to define a fastpath through the flowtable datapath. +The flowtable supports for the layer 3 IPv4 and IPv6 and the layer 4 TCP +and UDP protocols. + +.. figure:: /_static/images/firewall-flowtable-packet-flow.png + +Once the first packet of the flow successfully goes through the IP forwarding +path (black circles path), from the second packet on, you might decide to +offload the flow to the flowtable through your ruleset. The flowtable +infrastructure provides a rule action that allows you to specify when to add +a flow to the flowtable (On forward filtering, red circle number 6) + +A packet that finds a matching entry in the flowtable (flowtable hit) is +transmitted to the output netdevice, hence, packets bypass the classic IP +forwarding path and uses the **Fast Path** (orange circles path). The visible +effect is that you do not see these packets from any of the Netfilter +hooks coming after ingress. In case that there is no matching entry in the +flowtable (flowtable miss), the packet follows the classic IP forwarding path. + +.. note:: **Flowtable Reference:** + https://docs.kernel.org/networking/nf_flowtable.html
\ No newline at end of file diff --git a/docs/configuration/firewall/general.rst b/docs/configuration/firewall/general.rst deleted file mode 100644 index 523215ec..00000000 --- a/docs/configuration/firewall/general.rst +++ /dev/null @@ -1,1471 +0,0 @@ -:lastproofread: 2023-09-17 - -.. _firewall-configuration: - -###################### -Firewall Configuration -###################### - -******** -Overview -******** - -VyOS makes use of Linux `netfilter <https://netfilter.org/>`_ for packet -filtering. - -The firewall supports the creation of groups for addresses, domains, -interfaces, mac-addresses, networks and port groups. This groups can be used -later in firewall ruleset as desired. - -Main structure is shown next: - -.. code-block:: none - - - set firewall - * bridge - - forward - + filter - * flowtable - - custom_flow_table - + ... - * global-options - + all-ping - + broadcast-ping - + ... - * group - - address-group - - ipv6-address-group - - network-group - - ipv6-network-group - - interface-group - - mac-group - - port-group - - domain-group - * ipv4 - - forward - + filter - - input - + filter - - output - + filter - - name - + custom_name - * ipv6 - - forward - + filter - - input - + filter - - output - + filter - - ipv6-name - + custom_name - * zone - - custom_zone_name - + ... - -Where, main key words and configuration paths that needs to be understood: - - * For firewall filtering, configuration should be done in ``set firewall - [ipv4 | ipv6] ...`` - - * For transit traffic, which is received by the router and forwarded, - base chain is **forward filter**: ``set firewall [ipv4 | ipv6] - forward filter ...`` - - * For traffic originated by the router, base chain is **output filter**: - ``set firewall [ipv4 | ipv6] output filter ...`` - - * For traffic towards the router itself, base chain is **input filter**: - ``set firewall [ipv4 | ipv6] input filter ...`` - -.. note:: **Important note about default-actions:** - If default action for any chain is not defined, then the default - action is set to **accept** for that chain. Only for custom chains, - the default action is set to **drop**. - -Custom firewall chains can be created, with commands -``set firewall [ipv4 | ipv6] name <name> ...``. In order to use -such custom chain, a rule with **action jump**, and the appropiate **target** -should be defined in a base chain. - -************** -Global Options -************** - -Some firewall settings are global and have an affect on the whole system. - -.. cfgcmd:: set firewall global-options all-ping [enable | disable] - - By default, when VyOS receives an ICMP echo request packet destined for - itself, it will answer with an ICMP echo reply, unless you avoid it - through its firewall. - - With the firewall you can set rules to accept, drop or reject ICMP in, - out or local traffic. You can also use the general **firewall all-ping** - command. This command affects only to LOCAL (packets destined for your - VyOS system), not to IN or OUT traffic. - - .. note:: **firewall global-options all-ping** affects only to LOCAL - and it always behaves in the most restrictive way - - .. code-block:: none - - set firewall global-options all-ping enable - - When the command above is set, VyOS will answer every ICMP echo request - addressed to itself, but that will only happen if no other rule is - applied dropping or rejecting local echo requests. In case of conflict, - VyOS will not answer ICMP echo requests. - - .. code-block:: none - - set firewall global-options all-ping disable - - When the command above is set, VyOS will answer no ICMP echo request - addressed to itself at all, no matter where it comes from or whether - more specific rules are being applied to accept them. - -.. cfgcmd:: set firewall global-options broadcast-ping [enable | disable] - - This setting enable or disable the response of icmp broadcast - messages. The following system parameter will be altered: - - * ``net.ipv4.icmp_echo_ignore_broadcasts`` - -.. cfgcmd:: set firewall global-options ip-src-route [enable | disable] -.. cfgcmd:: set firewall global-options ipv6-src-route [enable | disable] - - This setting handle if VyOS accept packets with a source route - option. The following system parameter will be altered: - - * ``net.ipv4.conf.all.accept_source_route`` - * ``net.ipv6.conf.all.accept_source_route`` - -.. cfgcmd:: set firewall global-options receive-redirects [enable | disable] -.. cfgcmd:: set firewall global-options ipv6-receive-redirects - [enable | disable] - - enable or disable of ICMPv4 or ICMPv6 redirect messages accepted - by VyOS. The following system parameter will be altered: - - * ``net.ipv4.conf.all.accept_redirects`` - * ``net.ipv6.conf.all.accept_redirects`` - -.. cfgcmd:: set firewall global-options send-redirects [enable | disable] - - enable or disable ICMPv4 redirect messages send by VyOS - The following system parameter will be altered: - - * ``net.ipv4.conf.all.send_redirects`` - -.. cfgcmd:: set firewall global-options log-martians [enable | disable] - - enable or disable the logging of martian IPv4 packets. - The following system parameter will be altered: - - * ``net.ipv4.conf.all.log_martians`` - -.. cfgcmd:: set firewall global-options source-validation - [strict | loose | disable] - - Set the IPv4 source validation mode. - The following system parameter will be altered: - - * ``net.ipv4.conf.all.rp_filter`` - -.. cfgcmd:: set firewall global-options syn-cookies [enable | disable] - - Enable or Disable if VyOS use IPv4 TCP SYN Cookies. - The following system parameter will be altered: - - * ``net.ipv4.tcp_syncookies`` - -.. cfgcmd:: set firewall global-options twa-hazards-protection - [enable | disable] - - Enable or Disable VyOS to be :rfc:`1337` conform. - The following system parameter will be altered: - - * ``net.ipv4.tcp_rfc1337`` - -****** -Groups -****** - -Firewall groups represent collections of IP addresses, networks, ports, -mac addresses, domains or interfaces. Once created, a group can be referenced -by firewall, nat and policy route rules as either a source or destination -matcher, and as inbpund/outbound in the case of interface group. - -Address Groups -============== - -In an **address group** a single IP address or IP address ranges are -defined. - -.. cfgcmd:: set firewall group address-group <name> address [address | - address range] -.. cfgcmd:: set firewall group ipv6-address-group <name> address <address> - - Define a IPv4 or a IPv6 address group - - .. code-block:: none - - set firewall group address-group ADR-INSIDE-v4 address 192.168.0.1 - set firewall group address-group ADR-INSIDE-v4 address 10.0.0.1-10.0.0.8 - set firewall group ipv6-address-group ADR-INSIDE-v6 address 2001:db8::1 - -.. cfgcmd:: set firewall group address-group <name> description <text> -.. cfgcmd:: set firewall group ipv6-address-group <name> description <text> - - Provide a IPv4 or IPv6 address group description - -Network Groups -============== - -While **network groups** accept IP networks in CIDR notation, specific -IP addresses can be added as a 32-bit prefix. If you foresee the need -to add a mix of addresses and networks, the network group is -recommended. - -.. cfgcmd:: set firewall group network-group <name> network <CIDR> -.. cfgcmd:: set firewall group ipv6-network-group <name> network <CIDR> - - Define a IPv4 or IPv6 Network group. - - .. code-block:: none - - set firewall group network-group NET-INSIDE-v4 network 192.168.0.0/24 - set firewall group network-group NET-INSIDE-v4 network 192.168.1.0/24 - set firewall group ipv6-network-group NET-INSIDE-v6 network 2001:db8::/64 - -.. cfgcmd:: set firewall group network-group <name> description <text> -.. cfgcmd:: set firewall group ipv6-network-group <name> description <text> - - Provide an IPv4 or IPv6 network group description. - -Interface Groups -================ - -An **interface group** represents a collection of interfaces. - -.. cfgcmd:: set firewall group interface-group <name> interface <text> - - Define an interface group. Wildcard are accepted too. - -.. code-block:: none - - set firewall group interface-group LAN interface bond1001 - set firewall group interface-group LAN interface eth3* - -.. cfgcmd:: set firewall group interface-group <name> description <text> - - Provide an interface group description - -Port Groups -=========== - -A **port group** represents only port numbers, not the protocol. Port -groups can be referenced for either TCP or UDP. It is recommended that -TCP and UDP groups are created separately to avoid accidentally -filtering unnecessary ports. Ranges of ports can be specified by using -`-`. - -.. cfgcmd:: set firewall group port-group <name> port - [portname | portnumber | startport-endport] - - Define a port group. A port name can be any name defined in - /etc/services. e.g.: http - - .. code-block:: none - - set firewall group port-group PORT-TCP-SERVER1 port http - set firewall group port-group PORT-TCP-SERVER1 port 443 - set firewall group port-group PORT-TCP-SERVER1 port 5000-5010 - -.. cfgcmd:: set firewall group port-group <name> description <text> - - Provide a port group description. - -MAC Groups -========== - -A **mac group** represents a collection of mac addresses. - -.. cfgcmd:: set firewall group mac-group <name> mac-address <mac-address> - - Define a mac group. - -.. code-block:: none - - set firewall group mac-group MAC-G01 mac-address 88:a4:c2:15:b6:4f - set firewall group mac-group MAC-G01 mac-address 4c:d5:77:c0:19:81 - -.. cfgcmd:: set firewall group mac-group <name> description <text> - - Provide a mac group description. - -Domain Groups -============= - -A **domain group** represents a collection of domains. - -.. cfgcmd:: set firewall group domain-group <name> address <domain> - - Define a domain group. - -.. code-block:: none - - set firewall group domain-group DOM address example.com - -.. cfgcmd:: set firewall group domain-group <name> description <text> - - Provide a domain group description. - -****************************** -Firewall - IPv4 and IPv6 Rules -****************************** - -For firewall filtering, firewall rules needs to be created. Each rule is -numbered, has an action to apply if the rule is matched, and the ability -to specify multiple criteria matchers. Data packets go through the rules -from 1 - 999999, so order is crucial. At the first match the action of the -rule will be executed. - -Actions -======= - -If a rule is defined, then an action must be defined for it. This tells the -firewall what to do if all criteria matchers defined for such rule do match. - -The action can be : - - * ``accept``: accept the packet. - - * ``continue``: continue parsing next rule. - - * ``drop``: drop the packet. - - * ``reject``: reject the packet. - - * ``jump``: jump to another custom chain. - - * ``return``: Return from the current chain and continue at the next rule - of the last chain. - - * ``queue``: Enqueue packet to userspace. - - * ``synproxy``: synproxy the packet. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> action - [accept | continue | drop | jump | queue | reject | return | synproxy] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> action - [accept | continue | drop | jump | queue | reject | return | synproxy] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> action - [accept | continue | drop | jump | queue | reject | return] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> action - [accept | continue | drop | jump | queue | reject | return] - - This required setting defines the action of the current rule. If action is - set to jump, then jump-target is also needed. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - jump-target <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - jump-target <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - jump-target <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - jump-target <text> - - To be used only when action is set to jump. Use this command to specify - jump target. - -Also, **default-action** is an action that takes place whenever a packet does -not match any rule in it's chain. For base chains, possible options for -**default-action** are **accept** or **drop**. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter default-action - [accept | drop] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter default-action - [accept | drop] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter default-action - [accept | drop] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> default-action - [accept | drop | jump | queue | reject | return] - - This set the default action of the rule-set if no rule matched a packet - criteria. If defacult-action is set to ``jump``, then - ``default-jump-target`` is also needed. Note that for base chains, default - action can only be set to ``accept`` or ``drop``, while on custom chain, - more actions are available. - -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> default-jump-target <text> - - To be used only when ``defult-action`` is set to ``jump``. Use this - command to specify jump target for default rule. - -.. note:: **Important note about default-actions:** - If default action for any chain is not defined, then the default - action is set to **drop** for that chain. - - -Firewall Logs -============= - -Logging can be enable for every single firewall rule. If enabled, other -log options can be defined. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> log - [disable | enable] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> log - [disable | enable] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> log - [disable | enable] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> log - [disable | enable] - - Enable or disable logging for the matched packet. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter enable-default-log -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter enable-default-log -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter enable-default-log -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> enable-default-log - - Use this command to enable the logging of the default action on - the specified chain. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - log-options level [emerg | alert | crit | err | warn | notice - | info | debug] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - log-options level [emerg | alert | crit | err | warn | notice - | info | debug] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - log-options level [emerg | alert | crit | err | warn | notice - | info | debug] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - log-options level [emerg | alert | crit | err | warn | notice - | info | debug] - - Define log-level. Only applicable if rule log is enable. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - log-options group <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - log-options group <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - log-options group <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - log-options group <0-65535> - - Define log group to send message to. Only applicable if rule log is enable. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - log-options snapshot-length <0-9000> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - log-options snapshot-length <0-9000> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - log-options snapshot-length <0-9000> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - log-options snapshot-length <0-9000> - - Define length of packet payload to include in netlink message. Only - applicable if rule log is enable and log group is defined. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - log-options queue-threshold <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - log-options queue-threshold <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - log-options queue-threshold <0-65535> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - log-options queue-threshold <0-65535> - - Define number of packets to queue inside the kernel before sending them to - userspace. Only applicable if rule log is enable and log group is defined. - - -Firewall Description -==================== - -For reference, a description can be defined for every single rule, and for -every defined custom chain. - -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> description <text> - - Provide a rule-set description to a custom firewall chain. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - description <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - description <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - description <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> description <text> - - Provide a description for each rule. - - -Rule Status -=========== - -When defining a rule, it is enable by default. In some cases, it is useful to -just disable the rule, rather than removing it. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> disable -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> disable -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> disable -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> disable - - Command for disabling a rule but keep it in the configuration. - - -Matching criteria -================= - -There are a lot of matching criteria against which the package can be tested. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - connection-status nat [destination | source] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - connection-status nat [destination | source] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - connection-status nat [destination | source] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - connection-status nat [destination | source] - - Match criteria based on nat connection status. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - connection-mark <1-2147483647> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - connection-mark <1-2147483647> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - connection-mark <1-2147483647> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - connection-mark <1-2147483647> - - Match criteria based on connection mark. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source address [address | addressrange | CIDR] - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination address [address | addressrange | CIDR] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination address [address | addressrange | CIDR] - - Match criteria based on source and/or destination address. This is similar - to the network groups part, but here you are able to negate the matching - addresses. - - .. code-block:: none - - set firewall ipv4 name FOO rule 50 source address 192.0.2.10-192.0.2.11 - # with a '!' the rule match everything except the specified subnet - set firewall ipv4 input filter FOO rule 51 source address !203.0.113.0/24 - set firewall ipv6 name FOO rule 100 source address 2001:db8::202 - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source address-mask [address] - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination address-mask [address] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination address-mask [address] - - An arbitrary netmask can be applied to mask addresses to only match against - a specific portion. This is particularly useful with IPv6 as rules will - remain valid if the IPv6 prefix changes and the host - portion of systems IPv6 address is static (for example, with SLAAC or - `tokenised IPv6 addresses - <https://datatracker.ietf.org/doc/id/draft-chown-6man-tokenised-ipv6-identifiers-02.txt>`_) - - This functions for both individual addresses and address groups. - - .. code-block:: none - - # Match any IPv6 address with the suffix ::0000:0000:0000:beef - set firewall ipv6 forward filter rule 100 destination address ::beef - set firewall ipv6 forward filter rule 100 destination address-mask ::ffff:ffff:ffff:ffff - # Match any IPv4 address with `11` as the 2nd octet and `13` as the forth octet - set firewall ipv4 name FOO rule 100 destination address 0.11.0.13 - set firewall ipv4 name FOO rule 100 destination address-mask 0.255.0.255 - # Address groups - set firewall group ipv6-address-group WEBSERVERS address ::1000 - set firewall group ipv6-address-group WEBSERVERS address ::2000 - set firewall ipv6 forward filter rule 200 source group address-group WEBSERVERS - set firewall ipv6 forward filter rule 200 source address-mask ::ffff:ffff:ffff:ffff - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination fqdn <fqdn> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination fqdn <fqdn> - - Specify a Fully Qualified Domain Name as source/destination matcher. Ensure - router is able to resolve such dns query. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source geoip country-code <country> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination geoip country-code <country> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination geoip country-code <country> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source geoip inverse-match - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination geoip inverse-match -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination geoip inverse-match - - Match IP addresses based on its geolocation. More info: `geoip matching - <https://wiki.nftables.org/wiki-nftables/index.php/GeoIP_matching>`_. - Use inverse-match to match anything except the given country-codes. - -Data is provided by DB-IP.com under CC-BY-4.0 license. Attribution required, -permits redistribution so we can include a database in images(~3MB -compressed). Includes cron script (manually callable by op-mode update -geoip) to keep database and rules updated. - - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source mac-address <mac-address> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source mac-address <mac-address> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source mac-address <mac-address> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source mac-address <mac-address> - - Only in the source criteria, you can specify a mac-address. - - .. code-block:: none - - set firewall ipv4 input filter rule 100 source mac-address 00:53:00:11:22:33 - set firewall ipv4 input filter rule 101 source mac-address !00:53:00:aa:12:34 - - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source port [1-65535 | portname | start-end] - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination port [1-65535 | portname | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination port [1-65535 | portname | start-end] - - A port can be set with a port number or a name which is here - defined: ``/etc/services``. - - .. code-block:: none - - set firewall ipv4 forward filter rule 10 source port '22' - set firewall ipv4 forward filter rule 11 source port '!http' - set firewall ipv4 forward filter rule 12 source port 'https' - - Multiple source ports can be specified as a comma-separated list. - The whole list can also be "negated" using ``!``. For example: - - .. code-block:: none - - set firewall ipv6 forward filter rule 10 source port '!22,https,3333-3338' - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source group address-group <name | !name> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination group address-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination group address-group <name | !name> - - Use a specific address-group. Prepend character ``!`` for inverted matching - criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source group network-group <name | !name> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination group network-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination group network-group <name | !name> - - Use a specific network-group. Prepend character ``!`` for inverted matching - criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source group port-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source group port-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source group port-group <name | !name> -.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> - source group port-group <name | !name> -.. cfgcmd:: set firewall ipv6 ipv6-name <name> rule <1-999999> - source group port-group <name | !name> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination group port-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination group port-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination group port-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination group port-group <name | !name> - - Use a specific port-group. Prepend character ``!`` for inverted matching - criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source group domain-group <name | !name> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination group domain-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination group domain-group <name | !name> - - Use a specific domain-group. Prepend character ``!`` for inverted matching - criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - source group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - source group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - source group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - source group mac-group <name | !name> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - destination group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - destination group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - destination group mac-group <name | !name> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - destination group mac-group <name | !name> - - Use a specific mac-group. Prepend character ``!`` for inverted matching - criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - dscp [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - dscp [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - dscp [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - dscp [0-63 | start-end] - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - dscp-exclude [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - dscp-exclude [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - dscp-exclude [0-63 | start-end] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - dscp-exclude [0-63 | start-end] - - Match based on dscp value. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - fragment [match-frag | match-non-frag] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - fragment [match-frag | match-non-frag] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - fragment [match-frag | match-non-frag] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - fragment [match-frag | match-non-frag] - - Match based on fragment criteria. - -.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> - icmp [code | type] <0-255> -.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> - icmp [code | type] <0-255> -.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> - icmp [code | type] <0-255> -.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> - icmp [code | type] <0-255> -.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> - icmpv6 [code | type] <0-255> -.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> - icmpv6 [code | type] <0-255> -.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> - icmpv6 [code | type] <0-255> -.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> - icmpv6 [code | type] <0-255> - - Match based on icmp|icmpv6 code and type. - -.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> - icmp type-name <text> -.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> - icmp type-name <text> -.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> - icmp type-name <text> -.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> - icmp type-name <text> -.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> - icmpv6 type-name <text> -.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> - icmpv6 type-name <text> -.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> - icmpv6 type-name <text> -.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> - icmpv6 type-name <text> - - Match based on icmp|icmpv6 type-name criteria. Use tab for information - about what **type-name** criteria are supported. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - inbound-interface name <iface> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - inbound-interface name <iface> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - inbound-interface name <iface> - - Match based on inbound interface. Wilcard ``*`` can be used. - For example: ``eth2*``. Prepending character ``!`` for inverted matching - criteria is also supportd. For example ``!eth2`` - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - inbound-interface group <iface_group> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - inbound-interface group <iface_group> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - inbound-interface group <iface_group> - - Match based on inbound interface group. Prepending character ``!`` for - inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - outbound-interface name <iface> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - outbound-interface name <iface> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - outbound-interface name <iface> - - Match based on outbound interface. Wilcard ``*`` can be used. - For example: ``eth2*``. Prepending character ``!`` for inverted matching - criteria is also supportd. For example ``!eth2`` - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - outbound-interface group <iface_group> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - outbound-interface group <iface_group> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - outbound-interface group <iface_group> - - Match based on outbound interface group. Prepending character ``!`` for - inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - ipsec [match-ipsec | match-none] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - ipsec [match-ipsec | match-none] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - ipsec [match-ipsec | match-none] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - ipsec [match-ipsec | match-none] - - Match based on ipsec criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - limit burst <0-4294967295> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - limit burst <0-4294967295> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - limit burst <0-4294967295> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - limit burst <0-4294967295> - - Match based on the maximum number of packets to allow in excess of rate. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - limit rate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - limit rate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - limit rate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - limit rate <text> - - Match based on the maximum average rate, specified as **integer/unit**. - For example **5/minutes** - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - packet-length <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - packet-length <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - packet-length <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - packet-length <text> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - packet-length-exclude <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - packet-length-exclude <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - packet-length-exclude <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - packet-length-exclude <text> - - Match based on packet length criteria. Multiple values from 1 to 65535 - and ranges are supported. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - packet-type [broadcast | host | multicast | other] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - packet-type [broadcast | host | multicast | other] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - packet-type [broadcast | host | multicast | other] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - packet-type [broadcast | host | multicast | other] - - Match based on packet type criteria. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - protocol [<text> | <0-255> | all | tcp_udp] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - protocol [<text> | <0-255> | all | tcp_udp] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - protocol [<text> | <0-255> | all | tcp_udp] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - protocol [<text> | <0-255> | all | tcp_udp] - - Match a protocol criteria. A protocol number or a name which is here - defined: ``/etc/protocols``. - Special names are ``all`` for all protocols and ``tcp_udp`` for tcp and udp - based packets. The ``!`` negate the selected protocol. - - .. code-block:: none - - set firewall ipv4 forward fitler rule 10 protocol tcp_udp - set firewall ipv4 forward fitler rule 11 protocol !tcp_udp - set firewall ipv6 input filter rule 10 protocol tcp - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - recent count <1-255> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - recent time [second | minute | hour] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - recent time [second | minute | hour] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - recent time [second | minute | hour] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - recent time [second | minute | hour] - - Match bases on recently seen sources. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - tcp flags <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - tcp flags <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - tcp flags <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - tcp flags <text> - - Allowed values fpr TCP flags: ``SYN``, ``ACK``, ``FIN``, ``RST``, ``URG``, - ``PSH``, ``ALL`` When specifying more than one flag, flags should be comma - separated. The ``!`` negate the selected protocol. - - .. code-block:: none - - set firewall ipv4 input filter rule 10 tcp flags 'ACK' - set firewall ipv4 input filter rule 12 tcp flags 'SYN' - set firewall ipv4 input filter rule 13 tcp flags 'SYN,!ACK,!FIN,!RST' - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - state [established | invalid | new | related] [enable | disable] -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - state [established | invalid | new | related] [enable | disable] -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - state [established | invalid | new | related] [enable | disable] -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - state [established | invalid | new | related] [enable | disable] - - Match against the state of a packet. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - time startdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - time startdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - time startdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - time startdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - time starttime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - time starttime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - time starttime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - time starttime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - time stopdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - time stopdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - time stopdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - time stopdate <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - time stoptime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - time stoptime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - time stoptime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - time stoptime <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - time weekdays <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - time weekdays <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - time weekdays <text> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - time weekdays <text> - - Time to match the defined rule. - -.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> - ttl <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> - ttl <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> - ttl <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> - ttl <eq | gt | lt> <0-255> - - Match time to live parameter, where 'eq' stands for 'equal'; 'gt' stands for - 'greater than', and 'lt' stands for 'less than'. - -.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> - hop-limit <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> - hop-limit <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> - hop-limit <eq | gt | lt> <0-255> -.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> - hop-limit <eq | gt | lt> <0-255> - - Match hop-limit parameter, where 'eq' stands for 'equal'; 'gt' stands for - 'greater than', and 'lt' stands for 'less than'. - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - recent count <1-255> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - recent count <1-255> - -.. cfgcmd:: set firewall [ipv4 | ipv6] forward filter rule <1-999999> - recent time <second | minute | hour> -.. cfgcmd:: set firewall [ipv4 | ipv6] input filter rule <1-999999> - recent time <second | minute | hour> -.. cfgcmd:: set firewall [ipv4 | ipv6] output filter rule <1-999999> - recent time <second | minute | hour> -.. cfgcmd:: set firewall [ipv4 | ipv6] name <name> rule <1-999999> - recent time <second | minute | hour> - - Match when 'count' amount of connections are seen within 'time'. These - matching criteria can be used to block brute-force attempts. - -***************** -Firewall - Bridge -***************** - -********************* -Firewall - Flowtables -********************* - -******** -Synproxy -******** -Synproxy connections - -.. cfgcmd:: set firewall [ipv4 | ipv6] [input | forward] filter rule <1-999999> action synproxy -.. cfgcmd:: set firewall [ipv4 | ipv6] [input | forward] filter rule <1-999999> protocol tcp -.. cfgcmd:: set firewall [ipv4 | ipv6] [input | forward] filter rule <1-999999> synproxy tcp mss <501-65535> - - Set TCP-MSS (maximum segment size) for the connection - -.. cfgcmd:: set firewall [ipv4 | ipv6] [input | forward] filter rule <1-999999> synproxy tcp window-scale <1-14> - - Set the window scale factor for TCP window scaling - -Example synproxy -================ -Requirements to enable synproxy: - - * Traffic must be symmetric - * Synproxy relies on syncookies and TCP timestamps, ensure these are enabled - * Disable conntrack loose track option - -.. code-block:: none - - set system sysctl parameter net.ipv4.tcp_timestamps value '1' - - set system conntrack tcp loose disable - set system conntrack ignore ipv4 rule 10 destination port '8080' - set system conntrack ignore ipv4 rule 10 protocol 'tcp' - set system conntrack ignore ipv4 rule 10 tcp flags syn - - set firewall global-options syn-cookies 'enable' - set firewall ipv4 input filter rule 10 action 'synproxy' - set firewall ipv4 input filter rule 10 destination port '8080' - set firewall ipv4 input filter rule 10 inbound-interface interface-name 'eth1' - set firewall ipv4 input filter rule 10 protocol 'tcp' - set firewall ipv4 input filter rule 10 synproxy tcp mss '1460' - set firewall ipv4 input filter rule 10 synproxy tcp window-scale '7' - set firewall ipv4 input filter rule 1000 action 'drop' - set firewall ipv4 input filter rule 1000 state invalid 'enable' - - -*********************** -Operation-mode Firewall -*********************** - -Rule-set overview -================= - -.. opcmd:: show firewall - - This will show you a basic firewall overview - - .. code-block:: none - - vyos@vyos:~$ show firewall - Rulesets Information - - --------------------------------- - IPv4 Firewall "forward filter" - - Rule Action Protocol Packets Bytes Conditions - ------- -------- ---------- --------- ------- ----------------------------------------- - 5 jump all 0 0 iifname "eth1" jump NAME_VyOS_MANAGEMENT - 10 jump all 0 0 oifname "eth1" jump NAME_WAN_IN - 15 jump all 0 0 iifname "eth3" jump NAME_WAN_IN - default accept all - - --------------------------------- - IPv4 Firewall "name VyOS_MANAGEMENT" - - Rule Action Protocol Packets Bytes Conditions - ------- -------- ---------- --------- ------- -------------------------------- - 5 accept all 0 0 ct state established accept - 10 drop all 0 0 ct state invalid - 20 accept all 0 0 ip saddr @A_GOOD_GUYS accept - 30 accept all 0 0 ip saddr @N_ENTIRE_RANGE accept - 40 accept all 0 0 ip saddr @A_VyOS_SERVERS accept - 50 accept icmp 0 0 meta l4proto icmp accept - default drop all 0 0 - - --------------------------------- - IPv6 Firewall "forward filter" - - Rule Action Protocol - ------- -------- ---------- - 5 jump all - 10 jump all - 15 jump all - default accept all - - --------------------------------- - IPv6 Firewall "input filter" - - Rule Action Protocol - ------- -------- ---------- - 5 jump all - default accept all - - --------------------------------- - IPv6 Firewall "ipv6_name IPV6-VyOS_MANAGEMENT" - - Rule Action Protocol - ------- -------- ---------- - 5 accept all - 10 drop all - 20 accept all - 30 accept all - 40 accept all - 50 accept ipv6-icmp - default drop all - -.. opcmd:: show firewall summary - - This will show you a summary of rule-sets and groups - - .. code-block:: none - - vyos@vyos:~$ show firewall summary - Ruleset Summary - - IPv6 Ruleset: - - Ruleset Hook Ruleset Priority Description - -------------- -------------------- ------------------------- - forward filter - input filter - ipv6_name IPV6-VyOS_MANAGEMENT - ipv6_name IPV6-WAN_IN PUBLIC_INTERNET - - IPv4 Ruleset: - - Ruleset Hook Ruleset Priority Description - -------------- ------------------ ------------------------- - forward filter - input filter - name VyOS_MANAGEMENT - name WAN_IN PUBLIC_INTERNET - - Firewall Groups - - Name Type References Members - ----------------------- ------------------ ----------------------- ---------------- - PBX address_group WAN_IN-100 198.51.100.77 - SERVERS address_group WAN_IN-110 192.0.2.10 - WAN_IN-111 192.0.2.11 - WAN_IN-112 192.0.2.12 - WAN_IN-120 - WAN_IN-121 - WAN_IN-122 - SUPPORT address_group VyOS_MANAGEMENT-20 192.168.1.2 - WAN_IN-20 - PHONE_VPN_SERVERS address_group WAN_IN-160 10.6.32.2 - PINGABLE_ADRESSES address_group WAN_IN-170 192.168.5.2 - WAN_IN-171 - PBX ipv6_address_group IPV6-WAN_IN-100 2001:db8::1 - SERVERS ipv6_address_group IPV6-WAN_IN-110 2001:db8::2 - IPV6-WAN_IN-111 2001:db8::3 - IPV6-WAN_IN-112 2001:db8::4 - IPV6-WAN_IN-120 - IPV6-WAN_IN-121 - IPV6-WAN_IN-122 - SUPPORT ipv6_address_group IPV6-VyOS_MANAGEMENT-20 2001:db8::5 - IPV6-WAN_IN-20 - - -.. opcmd:: show firewall [ipv4 | ipv6] [forward | input | output] filter - -.. opcmd:: show firewall ipv4 name <name> - -.. opcmd:: show firewall ipv6 ipv6-name <name> - - This command will give an overview of a single rule-set. - - .. code-block:: none - - vyos@vyos:~$ show firewall ipv4 input filter - Ruleset Information - - --------------------------------- - IPv4 Firewall "input filter" - - Rule Action Protocol Packets Bytes Conditions - ------- -------- ---------- --------- ------- ----------------------------------------- - 5 jump all 0 0 iifname "eth2" jump NAME_VyOS_MANAGEMENT - default accept all - -.. opcmd:: show firewall [ipv4 | ipv6] [forward | input | output] - filter rule <1-999999> - -.. opcmd:: show firewall ipv4 name <name> rule <1-999999> - -.. opcmd:: show firewall ipv6 ipv6-name <name> rule <1-999999> - - This command will give an overview of a rule in a single rule-set - -.. opcmd:: show firewall group <name> - - Overview of defined groups. You see the type, the members, and where the - group is used. - - .. code-block:: none - - vyos@vyos:~$ show firewall group LAN - Firewall Groups - - Name Type References Members - ------------ ------------------ ----------------------- ---------------- - LAN ipv6_network_group IPV6-VyOS_MANAGEMENT-30 2001:db8::0/64 - IPV6-WAN_IN-30 - LAN network_group VyOS_MANAGEMENT-30 192.168.200.0/24 - WAN_IN-30 - - -.. opcmd:: show firewall statistics - - This will show you a statistic of all rule-sets since the last boot. - -Show Firewall log -================= - -.. opcmd:: show log firewall [name | ipv6name] <name> - - Show the logs of a specific Rule-Set. - -.. note:: - At the moment it not possible to look at the whole firewall log with VyOS - operational commands. All logs will save to ``/var/logs/messages``. - For example: ``grep '10.10.0.10' /var/log/messages`` - - -Example Partial Config -====================== - -.. code-block:: none - - firewall { - group { - network-group BAD-NETWORKS { - network 198.51.100.0/24 - network 203.0.113.0/24 - } - network-group GOOD-NETWORKS { - network 192.0.2.0/24 - } - port-group BAD-PORTS { - port 65535 - } - } - ipv4 { - forward { - filter { - default-action accept - rule 5 { - action accept - source { - group { - network-group GOOD-NETWORKS - } - } - } - rule 10 { - action drop - description "Bad Networks" - protocol all - source { - group { - network-group BAD-NETWORKS - } - } - } - } - } - } - } - -Update geoip database -===================== - -.. opcmd:: update geoip - - Command used to update GeoIP database and firewall sets. diff --git a/docs/configuration/firewall/global-options.rst b/docs/configuration/firewall/global-options.rst new file mode 100644 index 00000000..316e0802 --- /dev/null +++ b/docs/configuration/firewall/global-options.rst @@ -0,0 +1,117 @@ +:lastproofread: 2023-11-07 + +.. _firewall-global-options-configuration: + +##################################### +Global Options Firewall Configuration +##################################### + +******** +Overview +******** + +Some firewall settings are global and have an affect on the whole system. +In this section there's useful information about these global-options that can +be configured using vyos cli. + +Configuration commands covered in this section: + +.. cfgcmd:: set firewall global-options ... + +************* +Configuration +************* + +.. cfgcmd:: set firewall global-options all-ping [enable | disable] + + By default, when VyOS receives an ICMP echo request packet destined for + itself, it will answer with an ICMP echo reply, unless you avoid it + through its firewall. + + With the firewall you can set rules to accept, drop or reject ICMP in, + out or local traffic. You can also use the general **firewall all-ping** + command. This command affects only to LOCAL (packets destined for your + VyOS system), not to IN or OUT traffic. + + .. note:: **firewall global-options all-ping** affects only to LOCAL + and it always behaves in the most restrictive way + + .. code-block:: none + + set firewall global-options all-ping enable + + When the command above is set, VyOS will answer every ICMP echo request + addressed to itself, but that will only happen if no other rule is + applied dropping or rejecting local echo requests. In case of conflict, + VyOS will not answer ICMP echo requests. + + .. code-block:: none + + set firewall global-options all-ping disable + + When the command above is set, VyOS will answer no ICMP echo request + addressed to itself at all, no matter where it comes from or whether + more specific rules are being applied to accept them. + +.. cfgcmd:: set firewall global-options broadcast-ping [enable | disable] + + This setting enable or disable the response of icmp broadcast + messages. The following system parameter will be altered: + + * ``net.ipv4.icmp_echo_ignore_broadcasts`` + +.. cfgcmd:: set firewall global-options ip-src-route [enable | disable] +.. cfgcmd:: set firewall global-options ipv6-src-route [enable | disable] + + This setting handle if VyOS accept packets with a source route + option. The following system parameter will be altered: + + * ``net.ipv4.conf.all.accept_source_route`` + * ``net.ipv6.conf.all.accept_source_route`` + +.. cfgcmd:: set firewall global-options receive-redirects [enable | disable] +.. cfgcmd:: set firewall global-options ipv6-receive-redirects + [enable | disable] + + enable or disable of ICMPv4 or ICMPv6 redirect messages accepted + by VyOS. The following system parameter will be altered: + + * ``net.ipv4.conf.all.accept_redirects`` + * ``net.ipv6.conf.all.accept_redirects`` + +.. cfgcmd:: set firewall global-options send-redirects [enable | disable] + + enable or disable ICMPv4 redirect messages send by VyOS + The following system parameter will be altered: + + * ``net.ipv4.conf.all.send_redirects`` + +.. cfgcmd:: set firewall global-options log-martians [enable | disable] + + enable or disable the logging of martian IPv4 packets. + The following system parameter will be altered: + + * ``net.ipv4.conf.all.log_martians`` + +.. cfgcmd:: set firewall global-options source-validation + [strict | loose | disable] + + Set the IPv4 source validation mode. + The following system parameter will be altered: + + * ``net.ipv4.conf.all.rp_filter`` + +.. cfgcmd:: set firewall global-options syn-cookies [enable | disable] + + Enable or Disable if VyOS use IPv4 TCP SYN Cookies. + The following system parameter will be altered: + + * ``net.ipv4.tcp_syncookies`` + +.. cfgcmd:: set firewall global-options twa-hazards-protection + [enable | disable] + + Enable or Disable VyOS to be :rfc:`1337` conform. + The following system parameter will be altered: + + * ``net.ipv4.tcp_rfc1337``
\ No newline at end of file diff --git a/docs/configuration/firewall/groups.rst b/docs/configuration/firewall/groups.rst new file mode 100644 index 00000000..aee68793 --- /dev/null +++ b/docs/configuration/firewall/groups.rst @@ -0,0 +1,210 @@ +:lastproofread: 2023-11-08 + +.. _firewall-groups-configuration: + +############### +Firewall groups +############### + +************* +Configuration +************* + +Firewall groups represent collections of IP addresses, networks, ports, +mac addresses, domains or interfaces. Once created, a group can be referenced +by firewall, nat and policy route rules as either a source or destination +matcher, and/or as inbound/outbound in the case of interface group. + +Address Groups +============== + +In an **address group** a single IP address or IP address ranges are +defined. + +.. cfgcmd:: set firewall group address-group <name> address [address | + address range] +.. cfgcmd:: set firewall group ipv6-address-group <name> address <address> + + Define a IPv4 or a IPv6 address group + + .. code-block:: none + + set firewall group address-group ADR-INSIDE-v4 address 192.168.0.1 + set firewall group address-group ADR-INSIDE-v4 address 10.0.0.1-10.0.0.8 + set firewall group ipv6-address-group ADR-INSIDE-v6 address 2001:db8::1 + +.. cfgcmd:: set firewall group address-group <name> description <text> +.. cfgcmd:: set firewall group ipv6-address-group <name> description <text> + + Provide a IPv4 or IPv6 address group description + +Network Groups +============== + +While **network groups** accept IP networks in CIDR notation, specific +IP addresses can be added as a 32-bit prefix. If you foresee the need +to add a mix of addresses and networks, the network group is +recommended. + +.. cfgcmd:: set firewall group network-group <name> network <CIDR> +.. cfgcmd:: set firewall group ipv6-network-group <name> network <CIDR> + + Define a IPv4 or IPv6 Network group. + + .. code-block:: none + + set firewall group network-group NET-INSIDE-v4 network 192.168.0.0/24 + set firewall group network-group NET-INSIDE-v4 network 192.168.1.0/24 + set firewall group ipv6-network-group NET-INSIDE-v6 network 2001:db8::/64 + +.. cfgcmd:: set firewall group network-group <name> description <text> +.. cfgcmd:: set firewall group ipv6-network-group <name> description <text> + + Provide an IPv4 or IPv6 network group description. + +Interface Groups +================ + +An **interface group** represents a collection of interfaces. + +.. cfgcmd:: set firewall group interface-group <name> interface <text> + + Define an interface group. Wildcard are accepted too. + +.. code-block:: none + + set firewall group interface-group LAN interface bond1001 + set firewall group interface-group LAN interface eth3* + +.. cfgcmd:: set firewall group interface-group <name> description <text> + + Provide an interface group description + +Port Groups +=========== + +A **port group** represents only port numbers, not the protocol. Port +groups can be referenced for either TCP or UDP. It is recommended that +TCP and UDP groups are created separately to avoid accidentally +filtering unnecessary ports. Ranges of ports can be specified by using +`-`. + +.. cfgcmd:: set firewall group port-group <name> port + [portname | portnumber | startport-endport] + + Define a port group. A port name can be any name defined in + /etc/services. e.g.: http + + .. code-block:: none + + set firewall group port-group PORT-TCP-SERVER1 port http + set firewall group port-group PORT-TCP-SERVER1 port 443 + set firewall group port-group PORT-TCP-SERVER1 port 5000-5010 + +.. cfgcmd:: set firewall group port-group <name> description <text> + + Provide a port group description. + +MAC Groups +========== + +A **mac group** represents a collection of mac addresses. + +.. cfgcmd:: set firewall group mac-group <name> mac-address <mac-address> + + Define a mac group. + +.. code-block:: none + + set firewall group mac-group MAC-G01 mac-address 88:a4:c2:15:b6:4f + set firewall group mac-group MAC-G01 mac-address 4c:d5:77:c0:19:81 + +.. cfgcmd:: set firewall group mac-group <name> description <text> + + Provide a mac group description. + +Domain Groups +============= + +A **domain group** represents a collection of domains. + +.. cfgcmd:: set firewall group domain-group <name> address <domain> + + Define a domain group. + +.. code-block:: none + + set firewall group domain-group DOM address example.com + +.. cfgcmd:: set firewall group domain-group <name> description <text> + + Provide a domain group description. + +******** +Examples +******** + +As said before, once firewall groups are created, they can be referenced +either in firewall, nat, nat66 and/or policy-route rules. + +Here is an example were multiple groups are created: + + .. code-block:: none + + set firewall group address-group SERVERS address 198.51.100.101 + set firewall group address-group SERVERS address 198.51.100.102 + set firewall group network-group TRUSTEDv4 network 192.0.2.0/30 + set firewall group network-group TRUSTEDv4 network 203.0.113.128/25 + set firewall group ipv6-network-group TRUSTEDv6 network 2001:db8::/64 + set firewall group interface-group LAN interface eth2.2001 + set firewall group interface-group LAN interface bon0 + set firewall group port-group PORT-SERVERS port http + set firewall group port-group PORT-SERVERS port 443 + set firewall group port-group PORT-SERVERS port 5000-5010 + +And next, some configuration example where groups are used: + + .. code-block:: none + + set firewall ipv4 input filter rule 10 action accept + set firewall ipv4 input filter rule 10 inbound-interface group !LAN + set firewall ipv4 forward filter rule 20 action accept + set firewall ipv4 forward filter rule 20 source group network-group TRUSTEDv4 + set firewall ipv6 input filter rule 10 action accept + set firewall ipv6 input filter rule 10 source-group network-group TRUSTEDv6 + set nat destination rule 101 inbound-interface group LAN + set nat destination rule 101 destination group address-group SERVERS + set nat destination rule 101 protocol tcp + set nat destination rule 101 destination group port-group PORT-SERVERS + set nat destination rule 101 translation address 203.0.113.250 + set policy route PBR rule 201 destination group port-group PORT-SERVERS + set policy route PBR rule 201 protocol tcp + set policy route PBR rule 201 set table 15 + +************** +Operation-mode +************** + +.. opcmd:: show firewall group <name> + + Overview of defined groups. You see the type, the members, and where the + group is used. + + .. code-block:: none + + vyos@ZBF-15-CLean:~$ show firewall group + Firewall Groups + + Name Type References Members + ------------ ------------------ ---------------------- ---------------- + SERVERS address_group nat-destination-101 198.51.100.101 + 198.51.100.102 + LAN interface_group ipv4-input-filter-10 bon0 + nat-destination-101 eth2.2001 + TRUSTEDv6 ipv6_network_group ipv6-input-filter-10 2001:db8::/64 + TRUSTEDv4 network_group ipv4-forward-filter-20 192.0.2.0/30 + 203.0.113.128/25 + PORT-SERVERS port_group route-PBR-201 443 + nat-destination-101 5000-5010 + http + vyos@ZBF-15-CLean:~$ diff --git a/docs/configuration/firewall/index.rst b/docs/configuration/firewall/index.rst index 651886f7..5d094278 100644 --- a/docs/configuration/firewall/index.rst +++ b/docs/configuration/firewall/index.rst @@ -1,4 +1,4 @@ -:lastproofread: 2023-11-01 +:lastproofread: 2023-11-08 ######## Firewall @@ -8,39 +8,164 @@ Firewall Starting from VyOS 1.4-rolling-202308040557, a new firewall structure can be found on all vyos installations. +*************** Netfilter based -^^^^^^^^^^^^^^^ -.. toctree:: - :maxdepth: 1 - :includehidden: +*************** - general +With VyOS being based on top of Linux and its kernel, the Netfilter project +created the iptables and now the successor nftables for the Linux kernel to +work directly on the data flows. This now extends the concept of zone-based +security to allow for manipulating the data at multiple stages once accepted +by the network interface and the driver before being handed off to the +destination (e.g. a web server OR another device). -With VyOS being based on top of Linux and its kernel, the Netfilter project created -the iptables and now the successor nftables for the Linux kernel to work directly -on the data flows. This now extends the concept of zone-based security to allow -for manipulating the data at multiple stages once accepted by the network interface -and the driver before being handed off to the destination (e.g. a web server OR -another device). +A simplified traffic flow, based on Netfilter packet flow, is shown next, in +order to have a full view and understanding of how packets are processed, and +what possible paths can take. -To configure VyOS with the new :doc:`firewall configuration </configuration/firewall/general>` +.. figure:: /_static/images/firewall-gral-packet-flow.png -The only stages VyOS will process as part of the firewall configuration is the -`forward` (F4 stage), `input` (L4 stage), and `output` (L5 stage). All the other -stages and steps are for reference and cant be manipulated through VyOS. +Main notes regarding this packet flow and terminology used in VyOS firewall: + + * **Bridge Port?**: choose appropiate path based on if interface were the + packet was received is part of a bridge, or not. + +If interface were the packet was received isn't part of a bridge, then packet +is processed at the **IP Layer**: + + * **Prerouting**: several actions can be done in this stage, and currently + these actions are defined in different parts in vyos configuration. Order + is important, and all these actions are performed before any actions + define under ``firewall`` section. Relevant configuration that acts in + this stage are: + + * **Conntrack Ignore**: rules defined under ``set system conntrack ignore + [ipv4 | ipv6] ...``. + + * **Policy Route**: rules defined under ``set policy [route | route6] + ...``. + + * **Destination NAT**: rules defined under ``set [nat | nat66] + destination...``. + + * **Destination is the router?**: choose appropiate path based on + destination IP address. Transit forward continunes to **forward**, + while traffic that destination IP address is configured on the router + continues to **input**. + + * **Input**: stage where traffic destinated to the router itself can be + filtered and controlled. This is where all rules for securing the router + should take place. This includes ipv4 and ipv6 filtering rules, defined + in: + + * ``set firewall ipv4 input filter ...``. + + * ``set firewall ipv6 input filter ...``. + + * **Forward**: stage where transit traffic can be filtered and controlled. + This includes ipv4 and ipv6 filtering rules, defined in: + + * ``set firewall ipv4 forward filter ...``. + + * ``set firewall ipv6 forward filter ...``. + + * **Output**: stage where traffic that is originated by the router itself + can be filtered and controlled. Bare in mind that this traffic can be a + new connection originted by a internal process running on VyOS router, + such as NTP, or can be a response to traffic received externaly through + **inputt** (for example response to an ssh login attempt to the router). + This includes ipv4 and ipv6 filtering rules, defined in: + + * ``set firewall ipv4 input filter ...``. + + * ``set firewall ipv6 output filter ...``. + + * **Postrouting**: as in **Prerouting**, several actions defined in + different parts of VyOS configuration are performed in this + stage. This includes: + + * **Source NAT**: rules defined under ``set [nat | nat66] + destination...``. + +If interface were the packet was received is part of a bridge, then packet +is processed at the **Bridge Layer**, which contains a ver basic setup where +for bridge filtering: + + * **Forward (Bridge)**: stage where traffic that is trasspasing through the + bridge is filtered and controlled: + + * ``set firewall bridge forward filter ...``. + +Main structure VyOS firewall cli is shown next: + +.. code-block:: none + + - set firewall + * bridge + - forward + + filter + * flowtable + - custom_flow_table + + ... + * global-options + + all-ping + + broadcast-ping + + ... + * group + - address-group + - ipv6-address-group + - network-group + - ipv6-network-group + - interface-group + - mac-group + - port-group + - domain-group + * ipv4 + - forward + + filter + - input + + filter + - output + + filter + - name + + custom_name + * ipv6 + - forward + + filter + - input + + filter + - output + + filter + - ipv6-name + + custom_name + * zone + - custom_zone_name + + ... + +Please, refer to appropiate section for more information about firewall +configuration: -In this example image, a simplifed traffic flow is shown to help provide context -to the terms of `forward`, `input`, and `output` for the new firewall CLI format. +.. toctree:: + :maxdepth: 1 + :includehidden: -.. figure:: /_static/images/firewall-netfilter.png + global-options + groups + bridge + ipv4 + ipv6 + flowtables + zone .. note:: **For more information** of Netfilter hooks and Linux networking packet flows can be found in `Netfilter-Hooks <https://wiki.nftables.org/wiki-nftables/index.php/Netfilter_hooks>`_ +*************** Legacy Firewall -^^^^^^^^^^^^^^^ +*************** + .. toctree:: :maxdepth: 1 :includehidden: @@ -51,7 +176,8 @@ Traditionally firewalls weere configured with the concept of data going in and out of an interface. The router just listened to the data flowing through and responding as required if it was directed at the router itself. -To configure VyOS with the :doc:`legacy firewall configuration </configuration/firewall/general-legacy>` +To configure VyOS with the +:doc:`legacy firewall configuration </configuration/firewall/general-legacy>` As the example image below shows, the device was configured with rules blocking inbound or outbound traffic on each interface. @@ -66,16 +192,18 @@ Zone-based firewall zone -With zone-based firewalls a new concept was implemented, in addtion to the standard -in and out traffic flows, a local flow was added. This local was for traffic -originating and destined to the router itself. Which means additional rules were -required to secure the firewall itself from the network, in addition to the existing -inbound and outbound rules from the traditional concept above. +With zone-based firewalls a new concept was implemented, in addtion to the +standard in and out traffic flows, a local flow was added. This local was for +traffic originating and destined to the router itself. Which means additional +rules were required to secure the firewall itself from the network, in +addition to the existing inbound and outbound rules from the traditional +concept above. -To configure VyOS with the :doc:`zone-based firewall configuration </configuration/firewall/zone>` +To configure VyOS with the +:doc:`zone-based firewall configuration </configuration/firewall/zone>` -As the example image below shows, the device now needs rules to allow/block traffic -to or from the services running on the device that have open connections on that -interface. +As the example image below shows, the device now needs rules to allow/block +traffic to or from the services running on the device that have open +connections on that interface. .. figure:: /_static/images/firewall-zonebased.png diff --git a/docs/configuration/firewall/ipv4.rst b/docs/configuration/firewall/ipv4.rst new file mode 100644 index 00000000..3fd365e1 --- /dev/null +++ b/docs/configuration/firewall/ipv4.rst @@ -0,0 +1,1145 @@ +:lastproofread: 2023-11-08 + +.. _firewall-ipv4-configuration: + +########################### +IPv4 Firewall Configuration +########################### + +******** +Overview +******** + +In this section there's useful information of all firewall configuration that +can be done regarding IPv4, and appropiate op-mode commands. +Configuration commands covered in this section: + +.. cfgcmd:: set firewall ipv4 ... + +From main structure defined in :doc:`Firewall Overview</configuration/firewall/index>` +in this section you can find detailed information only for the next part +of the general structure: + +.. code-block:: none + + - set firewall + * ipv4 + - forward + + filter + - input + + filter + - output + + filter + - name + + custom_name + +For transit traffic, which is received by the router and forwarded, base chain +is **forward**. A simplified packet flow diagram for transit traffic is shown +next: + +.. figure:: /_static/images/firewall-fwd-packet-flow.png + +Where firewall base chain to configure firewall filtering rules for transit +traffic is ``set firewall ipv4 forward filter ...``, which happens in stage 5, +highlightened with red color. + +For traffic towards the router itself, base chain is **input**, while traffic +originated by the router, base chain is **output**. +A new simplified packet flow diagram is shown next, which shows the path +for traffic destinated to the router itself, and traffic generated by the +router (starting from circle number 6): + +.. figure:: /_static/images/firewall-input-packet-flow.png + +Base chain is for traffic toward the router is ``set firewall ipv4 input +filter ...`` + +And base chain for traffic generated by the router is ``set firewall ipv4 +output filter ...`` + +.. note:: **Important note about default-actions:** + If default action for any base chain is not defined, then the default + action is set to **accept** for that chain. For custom chains, if default + action is not defined, then the default-action is set to **drop** + +Custom firewall chains can be created, with commands +``set firewall ipv4 name <name> ...``. In order to use +such custom chain, a rule with **action jump**, and the appropiate **target** +should be defined in a base chain. + +********************* +Firewall - IPv4 Rules +********************* + +For firewall filtering, firewall rules needs to be created. Each rule is +numbered, has an action to apply if the rule is matched, and the ability +to specify multiple criteria matchers. Data packets go through the rules +from 1 - 999999, so order is crucial. At the first match the action of the +rule will be executed. + +Actions +======= + +If a rule is defined, then an action must be defined for it. This tells the +firewall what to do if all criteria matchers defined for such rule do match. + +The action can be : + + * ``accept``: accept the packet. + + * ``continue``: continue parsing next rule. + + * ``drop``: drop the packet. + + * ``reject``: reject the packet. + + * ``jump``: jump to another custom chain. + + * ``return``: Return from the current chain and continue at the next rule + of the last chain. + + * ``queue``: Enqueue packet to userspace. + + * ``synproxy``: synproxy the packet. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return | synproxy] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return | synproxy] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return] + + This required setting defines the action of the current rule. If action is + set to jump, then jump-target is also needed. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + jump-target <text> + + To be used only when action is set to jump. Use this command to specify + jump target. + +Also, **default-action** is an action that takes place whenever a packet does +not match any rule in it's chain. For base chains, possible options for +**default-action** are **accept** or **drop**. + +.. cfgcmd:: set firewall ipv4 forward filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv4 input filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv4 output filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv4 name <name> default-action + [accept | drop | jump | queue | reject | return] + + This set the default action of the rule-set if no rule matched a packet + criteria. If defacult-action is set to ``jump``, then + ``default-jump-target`` is also needed. Note that for base chains, default + action can only be set to ``accept`` or ``drop``, while on custom chain, + more actions are available. + +.. cfgcmd:: set firewall ipv4 name <name> default-jump-target <text> + + To be used only when ``defult-action`` is set to ``jump``. Use this + command to specify jump target for default rule. + +.. note:: **Important note about default-actions:** + If default action for any base chain is not defined, then the default + action is set to **accept** for that chain. For custom chains, if default + action is not defined, then the default-action is set to **drop** + +Firewall Logs +============= + +Logging can be enable for every single firewall rule. If enabled, other +log options can be defined. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> log + [disable | enable] + + Enable or disable logging for the matched packet. + +.. cfgcmd:: set firewall ipv4 forward filter enable-default-log +.. cfgcmd:: set firewall ipv4 input filter enable-default-log +.. cfgcmd:: set firewall ipv4 output filter enable-default-log +.. cfgcmd:: set firewall ipv4 name <name> enable-default-log + + Use this command to enable the logging of the default action on + the specified chain. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] + + Define log-level. Only applicable if rule log is enable. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + log-options group <0-65535> + + Define log group to send message to. Only applicable if rule log is enable. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + log-options snapshot-length <0-9000> + + Define length of packet payload to include in netlink message. Only + applicable if rule log is enable and log group is defined. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + log-options queue-threshold <0-65535> + + Define number of packets to queue inside the kernel before sending them to + userspace. Only applicable if rule log is enable and log group is defined. + +Firewall Description +==================== + +For reference, a description can be defined for every single rule, and for +every defined custom chain. + +.. cfgcmd:: set firewall ipv4 name <name> description <text> + + Provide a rule-set description to a custom firewall chain. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> description <text> + + Provide a description for each rule. + +Rule Status +=========== + +When defining a rule, it is enable by default. In some cases, it is useful to +just disable the rule, rather than removing it. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> disable + + Command for disabling a rule but keep it in the configuration. + +Matching criteria +================= + +There are a lot of matching criteria against which the package can be tested. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + connection-status nat [destination | source] + + Match criteria based on nat connection status. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + connection-mark <1-2147483647> + + Match criteria based on connection mark. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source address [address | addressrange | CIDR] + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination address [address | addressrange | CIDR] + + Match criteria based on source and/or destination address. This is similar + to the network groups part, but here you are able to negate the matching + addresses. + + .. code-block:: none + + set firewall ipv4 name FOO rule 50 source address 192.0.2.10-192.0.2.11 + # with a '!' the rule match everything except the specified subnet + set firewall ipv4 input filter FOO rule 51 source address !203.0.113.0/24 + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source address-mask [address] + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination address-mask [address] + + An arbitrary netmask can be applied to mask addresses to only match against + a specific portion. + + This functions for both individual addresses and address groups. + + .. code-block:: none + + # Match any IPv4 address with `11` as the 2nd octet and `13` as the forth octet + set firewall ipv4 name FOO rule 100 destination address 0.11.0.13 + set firewall ipv4 name FOO rule 100 destination address-mask 0.255.0.255 + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination fqdn <fqdn> + + Specify a Fully Qualified Domain Name as source/destination matcher. Ensure + router is able to resolve such dns query. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source geoip country-code <country> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination geoip country-code <country> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source geoip inverse-match + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination geoip inverse-match + + Match IP addresses based on its geolocation. More info: `geoip matching + <https://wiki.nftables.org/wiki-nftables/index.php/GeoIP_matching>`_. + Use inverse-match to match anything except the given country-codes. + +Data is provided by DB-IP.com under CC-BY-4.0 license. Attribution required, +permits redistribution so we can include a database in images(~3MB +compressed). Includes cron script (manually callable by op-mode update +geoip) to keep database and rules updated. + + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source mac-address <mac-address> + + Only in the source criteria, you can specify a mac-address. + + .. code-block:: none + + set firewall ipv4 input filter rule 100 source mac-address 00:53:00:11:22:33 + set firewall ipv4 input filter rule 101 source mac-address !00:53:00:aa:12:34 + + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source port [1-65535 | portname | start-end] + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination port [1-65535 | portname | start-end] + + A port can be set with a port number or a name which is here + defined: ``/etc/services``. + + .. code-block:: none + + set firewall ipv4 forward filter rule 10 source port '22' + set firewall ipv4 forward filter rule 11 source port '!http' + set firewall ipv4 forward filter rule 12 source port 'https' + + Multiple source ports can be specified as a comma-separated list. + The whole list can also be "negated" using ``!``. For example: + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source group address-group <name | !name> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination group address-group <name | !name> + + Use a specific address-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source group network-group <name | !name> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination group network-group <name | !name> + + Use a specific network-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source group port-group <name | !name> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination group port-group <name | !name> + + Use a specific port-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source group domain-group <name | !name> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination group domain-group <name | !name> + + Use a specific domain-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + source group mac-group <name | !name> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + destination group mac-group <name | !name> + + Use a specific mac-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + dscp [0-63 | start-end] + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + dscp-exclude [0-63 | start-end] + + Match based on dscp value. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + fragment [match-frag | match-non-frag] + + Match based on fragment criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + icmp [code | type] <0-255> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + icmp [code | type] <0-255> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + icmp [code | type] <0-255> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + icmp [code | type] <0-255> + + Match based on icmp code and type. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + icmp type-name <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + icmp type-name <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + icmp type-name <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + icmp type-name <text> + + Match based on icmp type-name criteria. Use tab for information + about what **type-name** criteria are supported. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + inbound-interface name <iface> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + inbound-interface name <iface> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + inbound-interface name <iface> + + Match based on inbound interface. Wilcard ``*`` can be used. + For example: ``eth2*``. Prepending character ``!`` for inverted matching + criteria is also supportd. For example ``!eth2`` + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + inbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + inbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + inbound-interface group <iface_group> + + Match based on inbound interface group. Prepending character ``!`` for + inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + outbound-interface name <iface> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + outbound-interface name <iface> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + outbound-interface name <iface> + + Match based on outbound interface. Wilcard ``*`` can be used. + For example: ``eth2*``. Prepending character ``!`` for inverted matching + criteria is also supportd. For example ``!eth2`` + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + outbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + outbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + outbound-interface group <iface_group> + + Match based on outbound interface group. Prepending character ``!`` for + inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + ipsec [match-ipsec | match-none] + + Match based on ipsec criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + limit burst <0-4294967295> + + Match based on the maximum number of packets to allow in excess of rate. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + limit rate <text> + + Match based on the maximum average rate, specified as **integer/unit**. + For example **5/minutes** + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + packet-length <text> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + packet-length-exclude <text> + + Match based on packet length criteria. Multiple values from 1 to 65535 + and ranges are supported. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + packet-type [broadcast | host | multicast | other] + + Match based on packet type criteria. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] + + Match a protocol criteria. A protocol number or a name which is here + defined: ``/etc/protocols``. + Special names are ``all`` for all protocols and ``tcp_udp`` for tcp and udp + based packets. The ``!`` negate the selected protocol. + + .. code-block:: none + + set firewall ipv4 forward fitler rule 10 protocol tcp_udp + set firewall ipv4 forward fitler rule 11 protocol !tcp_udp + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + recent count <1-255> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + recent time [second | minute | hour] + + Match bases on recently seen sources. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + tcp flags [not] <text> + + Allowed values fpr TCP flags: ``ack``, ``cwr``, ``ecn``, ``fin``, ``psh``, + ``rst``, ``syn`` and ``urg``. Multiple values are supported, and for + inverted selection use ``not``, as shown in the example. + + .. code-block:: none + + set firewall ipv4 input filter rule 10 tcp flags 'ack' + set firewall ipv4 input filter rule 12 tcp flags 'syn' + set firewall ipv4 input filter rule 13 tcp flags not 'fin' + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + state [established | invalid | new | related] [enable | disable] + + Match against the state of a packet. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + time weekdays <text> + + Time to match the defined rule. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + ttl <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + ttl <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + ttl <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + ttl <eq | gt | lt> <0-255> + + Match time to live parameter, where 'eq' stands for 'equal'; 'gt' stands for + 'greater than', and 'lt' stands for 'less than'. + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + recent count <1-255> + +.. cfgcmd:: set firewall ipv4 forward filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv4 input filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv4 output filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv4 name <name> rule <1-999999> + recent time <second | minute | hour> + + Match when 'count' amount of connections are seen within 'time'. These + matching criteria can be used to block brute-force attempts. + +******** +Synproxy +******** +Synproxy connections + +.. cfgcmd:: set firewall ipv4 [input | forward] filter rule <1-999999> action synproxy +.. cfgcmd:: set firewall ipv4 [input | forward] filter rule <1-999999> protocol tcp +.. cfgcmd:: set firewall ipv4 [input | forward] filter rule <1-999999> synproxy tcp mss <501-65535> + + Set TCP-MSS (maximum segment size) for the connection + +.. cfgcmd:: set firewall ipv4 [input | forward] filter rule <1-999999> synproxy tcp window-scale <1-14> + + Set the window scale factor for TCP window scaling + +Example synproxy +================ +Requirements to enable synproxy: + + * Traffic must be symmetric + * Synproxy relies on syncookies and TCP timestamps, ensure these are enabled + * Disable conntrack loose track option + +.. code-block:: none + + set system sysctl parameter net.ipv4.tcp_timestamps value '1' + + set system conntrack tcp loose disable + set system conntrack ignore ipv4 rule 10 destination port '8080' + set system conntrack ignore ipv4 rule 10 protocol 'tcp' + set system conntrack ignore ipv4 rule 10 tcp flags syn + + set firewall global-options syn-cookies 'enable' + set firewall ipv4 input filter rule 10 action 'synproxy' + set firewall ipv4 input filter rule 10 destination port '8080' + set firewall ipv4 input filter rule 10 inbound-interface interface-name 'eth1' + set firewall ipv4 input filter rule 10 protocol 'tcp' + set firewall ipv4 input filter rule 10 synproxy tcp mss '1460' + set firewall ipv4 input filter rule 10 synproxy tcp window-scale '7' + set firewall ipv4 input filter rule 1000 action 'drop' + set firewall ipv4 input filter rule 1000 state invalid 'enable' + + +*********************** +Operation-mode Firewall +*********************** + +Rule-set overview +================= + +.. opcmd:: show firewall + + This will show you a basic firewall overview, for all ruleset, and not + only for ipv4 + + .. code-block:: none + + vyos@vyos:~$ show firewall + Rulesets Information + + --------------------------------- + ipv4 Firewall "forward filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ----------------------------- + 20 accept all 0 0 ip saddr @N_TRUSTEDv4 accept + 21 jump all 0 0 jump NAME_AUX + default accept all 0 0 + + --------------------------------- + ipv4 Firewall "input filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ------------------------- + 10 accept all 156 14377 iifname != @I_LAN accept + default accept all 0 0 + + --------------------------------- + ipv4 Firewall "name AUX" + + Rule Action Protocol Packets Bytes Conditions + ------ -------- ---------- --------- ------- -------------------------------------------- + 10 accept icmp 0 0 meta l4proto icmp accept + 20 accept udp 0 0 meta l4proto udp ip saddr @A_SERVERS accept + 30 drop all 0 0 ip saddr != @A_SERVERS iifname "eth2" + + --------------------------------- + ipv4 Firewall "output filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ---------------------------------------- + 10 reject all 0 0 oifname @I_LAN + 20 accept icmp 2 168 meta l4proto icmp oifname "eth0" accept + default accept all 72 9258 + + --------------------------------- + ipv6 Firewall "input filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ------------------------------- + 10 accept all 0 0 ip6 saddr @N6_TRUSTEDv6 accept + default accept all 2 112 + + vyos@vyos:~$ + +.. opcmd:: show firewall summary + + This will show you a summary of rule-sets and groups + + .. code-block:: none + + vyos@vyos:~$ show firewall summary + Ruleset Summary + + IPv6 Ruleset: + + Ruleset Hook Ruleset Priority Description + -------------- -------------------- ------------------------- + forward filter + input filter + ipv6_name IPV6-VyOS_MANAGEMENT + ipv6_name IPV6-WAN_IN PUBLIC_INTERNET + + IPv4 Ruleset: + + Ruleset Hook Ruleset Priority Description + -------------- ------------------ ------------------------- + forward filter + input filter + name VyOS_MANAGEMENT + name WAN_IN PUBLIC_INTERNET + + Firewall Groups + + Name Type References Members + ----------------------- ------------------ ----------------------- ---------------- + PBX address_group WAN_IN-100 198.51.100.77 + SERVERS address_group WAN_IN-110 192.0.2.10 + WAN_IN-111 192.0.2.11 + WAN_IN-112 192.0.2.12 + WAN_IN-120 + WAN_IN-121 + WAN_IN-122 + SUPPORT address_group VyOS_MANAGEMENT-20 192.168.1.2 + WAN_IN-20 + PHONE_VPN_SERVERS address_group WAN_IN-160 10.6.32.2 + PINGABLE_ADRESSES address_group WAN_IN-170 192.168.5.2 + WAN_IN-171 + PBX ipv6_address_group IPV6-WAN_IN-100 2001:db8::1 + SERVERS ipv6_address_group IPV6-WAN_IN-110 2001:db8::2 + IPV6-WAN_IN-111 2001:db8::3 + IPV6-WAN_IN-112 2001:db8::4 + IPV6-WAN_IN-120 + IPV6-WAN_IN-121 + IPV6-WAN_IN-122 + SUPPORT ipv6_address_group IPV6-VyOS_MANAGEMENT-20 2001:db8::5 + IPV6-WAN_IN-20 + + +.. opcmd:: show firewall ipv4 [forward | input | output] filter + +.. opcmd:: show firewall ipv4 name <name> + + This command will give an overview of a single rule-set. + + .. code-block:: none + + vyos@vyos:~$ show firewall ipv4 input filter + Ruleset Information + + --------------------------------- + IPv4 Firewall "input filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ----------------------------------------- + 5 jump all 0 0 iifname "eth2" jump NAME_VyOS_MANAGEMENT + default accept all + +.. opcmd:: show firewall ipv4 [forward | input | output] + filter rule <1-999999> +.. opcmd:: show firewall ipv4 name <name> rule <1-999999> + + This command will give an overview of a rule in a single rule-set, plus + information for default action. + +.. code-block:: none + + vyos@vyos:~$show firewall ipv4 output filter rule 20 + Rule Information + + --------------------------------- + ipv4 Firewall "output filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ---------------------------------------- + 20 accept icmp 2 168 meta l4proto icmp oifname "eth0" accept + default accept all 286 47614 + + vyos@vyos:~$ + + +.. opcmd:: show firewall statistics + + This will show you a statistic of all rule-sets since the last boot. + +Show Firewall log +================= + +.. opcmd:: show log firewall +.. opcmd:: show log firewall ipv4 +.. opcmd:: show log firewall ipv4 [forward | input | output | name] +.. opcmd:: show log firewall ipv4 [forward | input | output] filter +.. opcmd:: show log firewall ipv4 name <name> +.. opcmd:: show log firewall ipv4 [forward | input | output] filter rule <rule> +.. opcmd:: show log firewall ipv4 name <name> rule <rule> + + Show the logs of all firewall; show all ipv4 firewall logs; show all logs + for particular hook; show all logs for particular hook and priority; show all logs + for particular custom chain; show logs for specific Rule-Set. + +Example Partial Config +====================== + +.. code-block:: none + + firewall { + group { + network-group BAD-NETWORKS { + network 198.51.100.0/24 + network 203.0.113.0/24 + } + network-group GOOD-NETWORKS { + network 192.0.2.0/24 + } + port-group BAD-PORTS { + port 65535 + } + } + ipv4 { + forward { + filter { + default-action accept + rule 5 { + action accept + source { + group { + network-group GOOD-NETWORKS + } + } + } + rule 10 { + action drop + description "Bad Networks" + protocol all + source { + group { + network-group BAD-NETWORKS + } + } + } + } + } + } + } + +Update geoip database +===================== + +.. opcmd:: update geoip + + Command used to update GeoIP database and firewall sets. diff --git a/docs/configuration/firewall/ipv6.rst b/docs/configuration/firewall/ipv6.rst new file mode 100644 index 00000000..83a5f694 --- /dev/null +++ b/docs/configuration/firewall/ipv6.rst @@ -0,0 +1,1167 @@ +:lastproofread: 2023-11-08 + +.. _firewall-ipv6-configuration: + +########################### +IPv6 Firewall Configuration +########################### + +******** +Overview +******** + +In this section there's useful information of all firewall configuration that +can be done regarding IPv6, and appropiate op-mode commands. +Configuration commands covered in this section: + +.. cfgcmd:: set firewall ipv6 ... + +From main structure defined in :doc:`Firewall Overview</configuration/firewall/index>` +in this section you can find detailed information only for the next part +of the general structure: + +.. code-block:: none + + - set firewall + * ipv6 + - forward + + filter + - input + + filter + - output + + filter + - name + + custom_name + +For transit traffic, which is received by the router and forwarded, base chain +is **forward**. A simplified packet flow diagram for transit traffic is shown +next: + +.. figure:: /_static/images/firewall-fwd-packet-flow.png + +Where firewall base chain to configure firewall filtering rules for transit +traffic is ``set firewall ipv6 forward filter ...``, which happens in stage 5, +highlightened with red color. + +For traffic towards the router itself, base chain is **input**, while traffic +originated by the router, base chain is **output**. +A new simplified packet flow diagram is shown next, which shows the path +for traffic destinated to the router itself, and traffic generated by the +router (starting from circle number 6): + +.. figure:: /_static/images/firewall-input-packet-flow.png + +Base chain is for traffic toward the router is ``set firewall ipv6 input +filter ...`` + +And base chain for traffic generated by the router is ``set firewall ipv6 +output filter ...`` + +.. note:: **Important note about default-actions:** + If default action for any base chain is not defined, then the default + action is set to **accept** for that chain. For custom chains, if default + action is not defined, then the default-action is set to **drop** + +Custom firewall chains can be created, with commands +``set firewall ipv6 name <name> ...``. In order to use +such custom chain, a rule with **action jump**, and the appropiate **target** +should be defined in a base chain. + +****************************** +Firewall - IPv6 Rules +****************************** + +For firewall filtering, firewall rules needs to be created. Each rule is +numbered, has an action to apply if the rule is matched, and the ability +to specify multiple criteria matchers. Data packets go through the rules +from 1 - 999999, so order is crucial. At the first match the action of the +rule will be executed. + +Actions +======= + +If a rule is defined, then an action must be defined for it. This tells the +firewall what to do if all criteria matchers defined for such rule do match. + +The action can be : + + * ``accept``: accept the packet. + + * ``continue``: continue parsing next rule. + + * ``drop``: drop the packet. + + * ``reject``: reject the packet. + + * ``jump``: jump to another custom chain. + + * ``return``: Return from the current chain and continue at the next rule + of the last chain. + + * ``queue``: Enqueue packet to userspace. + + * ``synproxy``: synproxy the packet. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return | synproxy] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return | synproxy] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> action + [accept | continue | drop | jump | queue | reject | return] + + This required setting defines the action of the current rule. If action is + set to jump, then jump-target is also needed. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + jump-target <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + jump-target <text> + + To be used only when action is set to jump. Use this command to specify + jump target. + +Also, **default-action** is an action that takes place whenever a packet does +not match any rule in it's chain. For base chains, possible options for +**default-action** are **accept** or **drop**. + +.. cfgcmd:: set firewall ipv6 forward filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv6 input filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv6 output filter default-action + [accept | drop] +.. cfgcmd:: set firewall ipv6 name <name> default-action + [accept | drop | jump | queue | reject | return] + + This set the default action of the rule-set if no rule matched a packet + criteria. If defacult-action is set to ``jump``, then + ``default-jump-target`` is also needed. Note that for base chains, default + action can only be set to ``accept`` or ``drop``, while on custom chain, + more actions are available. + +.. cfgcmd:: set firewall ipv6 name <name> default-jump-target <text> + + To be used only when ``defult-action`` is set to ``jump``. Use this + command to specify jump target for default rule. + +.. note:: **Important note about default-actions:** + If default action for any base chain is not defined, then the default + action is set to **accept** for that chain. For custom chains, if default + action is not defined, then the default-action is set to **drop** + +Firewall Logs +============= + +Logging can be enable for every single firewall rule. If enabled, other +log options can be defined. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> log + [disable | enable] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> log + [disable | enable] + + Enable or disable logging for the matched packet. + +.. cfgcmd:: set firewall ipv6 forward filter enable-default-log +.. cfgcmd:: set firewall ipv6 input filter enable-default-log +.. cfgcmd:: set firewall ipv6 output filter enable-default-log +.. cfgcmd:: set firewall ipv6 name <name> enable-default-log + + Use this command to enable the logging of the default action on + the specified chain. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + log-options level [emerg | alert | crit | err | warn | notice + | info | debug] + + Define log-level. Only applicable if rule log is enable. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + log-options group <0-65535> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + log-options group <0-65535> + + Define log group to send message to. Only applicable if rule log is enable. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + log-options snapshot-length <0-9000> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + log-options snapshot-length <0-9000> + + Define length of packet payload to include in netlink message. Only + applicable if rule log is enable and log group is defined. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + log-options queue-threshold <0-65535> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + log-options queue-threshold <0-65535> + + Define number of packets to queue inside the kernel before sending them to + userspace. Only applicable if rule log is enable and log group is defined. + +Firewall Description +==================== + +For reference, a description can be defined for every single rule, and for +every defined custom chain. + +.. cfgcmd:: set firewall ipv6 name <name> description <text> + + Provide a rule-set description to a custom firewall chain. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + description <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> description <text> + + Provide a description for each rule. + +Rule Status +=========== + +When defining a rule, it is enable by default. In some cases, it is useful to +just disable the rule, rather than removing it. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> disable +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> disable + + Command for disabling a rule but keep it in the configuration. + +Matching criteria +================= + +There are a lot of matching criteria against which the package can be tested. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + connection-status nat [destination | source] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + connection-status nat [destination | source] + + Match criteria based on nat connection status. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + connection-mark <1-2147483647> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + connection-mark <1-2147483647> + + Match criteria based on connection mark. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source address [address | addressrange | CIDR] + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination address [address | addressrange | CIDR] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination address [address | addressrange | CIDR] + + Match criteria based on source and/or destination address. This is similar + to the network groups part, but here you are able to negate the matching + addresses. + + .. code-block:: none + + set firewall ipv6 name FOO rule 100 source address 2001:db8::202 + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source address-mask [address] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source address-mask [address] + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination address-mask [address] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination address-mask [address] + + An arbitrary netmask can be applied to mask addresses to only match against + a specific portion. This is particularly useful with IPv6 as rules will + remain valid if the IPv6 prefix changes and the host + portion of systems IPv6 address is static (for example, with SLAAC or + `tokenised IPv6 addresses + <https://datatracker.ietf.org/doc/id/draft-chown-6man-tokenised-ipv6-identifiers-02.txt>`_) + + This functions for both individual addresses and address groups. + + .. code-block:: none + + # Match any IPv6 address with the suffix ::0000:0000:0000:beef + set firewall ipv6 forward filter rule 100 destination address ::beef + set firewall ipv6 forward filter rule 100 destination address-mask ::ffff:ffff:ffff:ffff + # Address groups + set firewall group ipv6-address-group WEBSERVERS address ::1000 + set firewall group ipv6-address-group WEBSERVERS address ::2000 + set firewall ipv6 forward filter rule 200 source group address-group WEBSERVERS + set firewall ipv6 forward filter rule 200 source address-mask ::ffff:ffff:ffff:ffff + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination fqdn <fqdn> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination fqdn <fqdn> + + Specify a Fully Qualified Domain Name as source/destination matcher. Ensure + router is able to resolve such dns query. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source geoip country-code <country> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source geoip country-code <country> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination geoip country-code <country> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination geoip country-code <country> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source geoip inverse-match +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source geoip inverse-match + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination geoip inverse-match +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination geoip inverse-match + + Match IP addresses based on its geolocation. More info: `geoip matching + <https://wiki.nftables.org/wiki-nftables/index.php/GeoIP_matching>`_. + Use inverse-match to match anything except the given country-codes. + +Data is provided by DB-IP.com under CC-BY-4.0 license. Attribution required, +permits redistribution so we can include a database in images(~3MB +compressed). Includes cron script (manually callable by op-mode update +geoip) to keep database and rules updated. + + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source mac-address <mac-address> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source mac-address <mac-address> + + Only in the source criteria, you can specify a mac-address. + + .. code-block:: none + + set firewall ipv6 input filter rule 100 source mac-address 00:53:00:11:22:33 + set firewall ipv6 input filter rule 101 source mac-address !00:53:00:aa:12:34 + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source port [1-65535 | portname | start-end] + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination port [1-65535 | portname | start-end] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination port [1-65535 | portname | start-end] + + A port can be set with a port number or a name which is here + defined: ``/etc/services``. + + .. code-block:: none + + set firewall ipv6 forward filter rule 10 source port '22' + set firewall ipv6 forward filter rule 11 source port '!http' + set firewall ipv6 forward filter rule 12 source port 'https' + + Multiple source ports can be specified as a comma-separated list. + The whole list can also be "negated" using ``!``. For example: + + .. code-block:: none + + set firewall ipv6 forward filter rule 10 source port '!22,https,3333-3338' + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source group address-group <name | !name> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination group address-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination group address-group <name | !name> + + Use a specific address-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source group network-group <name | !name> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination group network-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination group network-group <name | !name> + + Use a specific network-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source group port-group <name | !name> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination group port-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination group port-group <name | !name> + + Use a specific port-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source group domain-group <name | !name> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination group domain-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination group domain-group <name | !name> + + Use a specific domain-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + source group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + source group mac-group <name | !name> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + destination group mac-group <name | !name> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + destination group mac-group <name | !name> + + Use a specific mac-group. Prepend character ``!`` for inverted matching + criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + dscp [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + dscp [0-63 | start-end] + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + dscp-exclude [0-63 | start-end] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + dscp-exclude [0-63 | start-end] + + Match based on dscp value. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + fragment [match-frag | match-non-frag] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + fragment [match-frag | match-non-frag] + + Match based on fragment criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + icmpv6 [code | type] <0-255> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + icmpv6 [code | type] <0-255> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + icmpv6 [code | type] <0-255> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + icmpv6 [code | type] <0-255> + + Match based on icmp|icmpv6 code and type. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + icmpv6 type-name <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + icmpv6 type-name <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + icmpv6 type-name <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + icmpv6 type-name <text> + + Match based on icmpv6 type-name criteria. Use tab for information + about what **type-name** criteria are supported. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + inbound-interface name <iface> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + inbound-interface name <iface> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + inbound-interface name <iface> + + Match based on inbound interface. Wilcard ``*`` can be used. + For example: ``eth2*``. Prepending character ``!`` for inverted matching + criteria is also supportd. For example ``!eth2`` + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + inbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + inbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + inbound-interface group <iface_group> + + Match based on inbound interface group. Prepending character ``!`` for + inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + outbound-interface name <iface> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + outbound-interface name <iface> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + outbound-interface name <iface> + + Match based on outbound interface. Wilcard ``*`` can be used. + For example: ``eth2*``. Prepending character ``!`` for inverted matching + criteria is also supportd. For example ``!eth2`` + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + outbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + outbound-interface group <iface_group> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + outbound-interface group <iface_group> + + Match based on outbound interface group. Prepending character ``!`` for + inverted matching criteria is also supportd. For example ``!IFACE_GROUP`` + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + ipsec [match-ipsec | match-none] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + ipsec [match-ipsec | match-none] + + Match based on ipsec criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + limit burst <0-4294967295> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + limit burst <0-4294967295> + + Match based on the maximum number of packets to allow in excess of rate. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + limit rate <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + limit rate <text> + + Match based on the maximum average rate, specified as **integer/unit**. + For example **5/minutes** + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + packet-length <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + packet-length <text> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + packet-length-exclude <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + packet-length-exclude <text> + + Match based on packet length criteria. Multiple values from 1 to 65535 + and ranges are supported. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + packet-type [broadcast | host | multicast | other] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + packet-type [broadcast | host | multicast | other] + + Match based on packet type criteria. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + protocol [<text> | <0-255> | all | tcp_udp] + + Match a protocol criteria. A protocol number or a name which is here + defined: ``/etc/protocols``. + Special names are ``all`` for all protocols and ``tcp_udp`` for tcp and udp + based packets. The ``!`` negate the selected protocol. + + .. code-block:: none + + set firewall ipv6 input filter rule 10 protocol tcp + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + recent count <1-255> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + recent time [second | minute | hour] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + recent time [second | minute | hour] + + Match bases on recently seen sources. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + tcp flags [not] <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + tcp flags [not] <text> + + Allowed values fpr TCP flags: ``ack``, ``cwr``, ``ecn``, ``fin``, ``psh``, + ``rst``, ``syn`` and ``urg``. Multiple values are supported, and for + inverted selection use ``not``, as shown in the example. + + .. code-block:: none + + set firewall ipv6 input filter rule 10 tcp flags 'ack' + set firewall ipv6 input filter rule 12 tcp flags 'syn' + set firewall ipv6 input filter rule 13 tcp flags not 'fin' + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + state [established | invalid | new | related] [enable | disable] +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + state [established | invalid | new | related] [enable | disable] + + Match against the state of a packet. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + time startdate <text> +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + time starttime <text> +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + time stopdate <text> +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + time stoptime <text> +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + time weekdays <text> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + time weekdays <text> + + Time to match the defined rule. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + hop-limit <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + hop-limit <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + hop-limit <eq | gt | lt> <0-255> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + hop-limit <eq | gt | lt> <0-255> + + Match hop-limit parameter, where 'eq' stands for 'equal'; 'gt' stands for + 'greater than', and 'lt' stands for 'less than'. + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + recent count <1-255> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + recent count <1-255> + +.. cfgcmd:: set firewall ipv6 forward filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv6 input filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv6 output filter rule <1-999999> + recent time <second | minute | hour> +.. cfgcmd:: set firewall ipv6 name <name> rule <1-999999> + recent time <second | minute | hour> + + Match when 'count' amount of connections are seen within 'time'. These + matching criteria can be used to block brute-force attempts. + +******** +Synproxy +******** +Synproxy connections + +.. cfgcmd:: set firewall ipv6 [input | forward] filter rule <1-999999> action synproxy +.. cfgcmd:: set firewall ipv6 [input | forward] filter rule <1-999999> protocol tcp +.. cfgcmd:: set firewall ipv6 [input | forward] filter rule <1-999999> synproxy tcp mss <501-65535> + + Set TCP-MSS (maximum segment size) for the connection + +.. cfgcmd:: set firewall ipv6 [input | forward] filter rule <1-999999> synproxy tcp window-scale <1-14> + + Set the window scale factor for TCP window scaling + +Example synproxy +================ +Requirements to enable synproxy: + + * Traffic must be symmetric + * Synproxy relies on syncookies and TCP timestamps, ensure these are enabled + * Disable conntrack loose track option + +.. code-block:: none + + set system sysctl parameter net.ipv4.tcp_timestamps value '1' + + set system conntrack tcp loose disable + set system conntrack ignore ipv6 rule 10 destination port '8080' + set system conntrack ignore ipv6 rule 10 protocol 'tcp' + set system conntrack ignore ipv6 rule 10 tcp flags syn + + set firewall global-options syn-cookies 'enable' + set firewall ipv6 input filter rule 10 action 'synproxy' + set firewall ipv6 input filter rule 10 destination port '8080' + set firewall ipv6 input filter rule 10 inbound-interface interface-name 'eth1' + set firewall ipv6 input filter rule 10 protocol 'tcp' + set firewall ipv6 input filter rule 10 synproxy tcp mss '1460' + set firewall ipv6 input filter rule 10 synproxy tcp window-scale '7' + set firewall ipv6 input filter rule 1000 action 'drop' + set firewall ipv6 input filter rule 1000 state invalid 'enable' + +*********************** +Operation-mode Firewall +*********************** + +Rule-set overview +================= + +.. opcmd:: show firewall + + This will show you a basic firewall overview + + .. code-block:: none + + vyos@vyos:~$ show firewall + Rulesets Information + + --------------------------------- + IPv4 Firewall "forward filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ----------------------------------------- + 5 jump all 0 0 iifname "eth1" jump NAME_VyOS_MANAGEMENT + 10 jump all 0 0 oifname "eth1" jump NAME_WAN_IN + 15 jump all 0 0 iifname "eth3" jump NAME_WAN_IN + default accept all + + --------------------------------- + IPv4 Firewall "name VyOS_MANAGEMENT" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- -------------------------------- + 5 accept all 0 0 ct state established accept + 10 drop all 0 0 ct state invalid + 20 accept all 0 0 ip saddr @A_GOOD_GUYS accept + 30 accept all 0 0 ip saddr @N_ENTIRE_RANGE accept + 40 accept all 0 0 ip saddr @A_VyOS_SERVERS accept + 50 accept icmp 0 0 meta l4proto icmp accept + default drop all 0 0 + + --------------------------------- + IPv6 Firewall "forward filter" + + Rule Action Protocol + ------- -------- ---------- + 5 jump all + 10 jump all + 15 jump all + default accept all + + --------------------------------- + IPv6 Firewall "input filter" + + Rule Action Protocol + ------- -------- ---------- + 5 jump all + default accept all + + --------------------------------- + IPv6 Firewall "ipv6_name IPV6-VyOS_MANAGEMENT" + + Rule Action Protocol + ------- -------- ---------- + 5 accept all + 10 drop all + 20 accept all + 30 accept all + 40 accept all + 50 accept ipv6-icmp + default drop all + +.. opcmd:: show firewall summary + + This will show you a summary of rule-sets and groups + + .. code-block:: none + + vyos@vyos:~$ show firewall summary + Ruleset Summary + + IPv6 Ruleset: + + Ruleset Hook Ruleset Priority Description + -------------- -------------------- ------------------------- + forward filter + input filter + ipv6_name IPV6-VyOS_MANAGEMENT + ipv6_name IPV6-WAN_IN PUBLIC_INTERNET + + IPv4 Ruleset: + + Ruleset Hook Ruleset Priority Description + -------------- ------------------ ------------------------- + forward filter + input filter + name VyOS_MANAGEMENT + name WAN_IN PUBLIC_INTERNET + + Firewall Groups + + Name Type References Members + ----------------------- ------------------ ----------------------- ---------------- + PBX address_group WAN_IN-100 198.51.100.77 + SERVERS address_group WAN_IN-110 192.0.2.10 + WAN_IN-111 192.0.2.11 + WAN_IN-112 192.0.2.12 + WAN_IN-120 + WAN_IN-121 + WAN_IN-122 + SUPPORT address_group VyOS_MANAGEMENT-20 192.168.1.2 + WAN_IN-20 + PHONE_VPN_SERVERS address_group WAN_IN-160 10.6.32.2 + PINGABLE_ADRESSES address_group WAN_IN-170 192.168.5.2 + WAN_IN-171 + PBX ipv6_address_group IPV6-WAN_IN-100 2001:db8::1 + SERVERS ipv6_address_group IPV6-WAN_IN-110 2001:db8::2 + IPV6-WAN_IN-111 2001:db8::3 + IPV6-WAN_IN-112 2001:db8::4 + IPV6-WAN_IN-120 + IPV6-WAN_IN-121 + IPV6-WAN_IN-122 + SUPPORT ipv6_address_group IPV6-VyOS_MANAGEMENT-20 2001:db8::5 + IPV6-WAN_IN-20 + + +.. opcmd:: show firewall ipv6 [forward | input | output] filter + +.. opcmd:: show firewall ipv4 name <name> + +.. opcmd:: show firewall ipv6 ipv6-name <name> + + This command will give an overview of a single rule-set. + + .. code-block:: none + + vyos@vyos:~$ show firewall ipv4 input filter + Ruleset Information + + --------------------------------- + IPv4 Firewall "input filter" + + Rule Action Protocol Packets Bytes Conditions + ------- -------- ---------- --------- ------- ----------------------------------------- + 5 jump all 0 0 iifname "eth2" jump NAME_VyOS_MANAGEMENT + default accept all + +.. opcmd:: show firewall ipv6 [forward | input | output] + filter rule <1-999999> + +.. opcmd:: show firewall ipv4 name <name> rule <1-999999> + +.. opcmd:: show firewall ipv6 ipv6-name <name> rule <1-999999> + + This command will give an overview of a rule in a single rule-set + +.. opcmd:: show firewall group <name> + + Overview of defined groups. You see the type, the members, and where the + group is used. + + .. code-block:: none + + vyos@vyos:~$ show firewall group LAN + Firewall Groups + + Name Type References Members + ------------ ------------------ ----------------------- ---------------- + LAN ipv6_network_group IPV6-VyOS_MANAGEMENT-30 2001:db8::0/64 + IPV6-WAN_IN-30 + LAN network_group VyOS_MANAGEMENT-30 192.168.200.0/24 + WAN_IN-30 + + +.. opcmd:: show firewall statistics + + This will show you a statistic of all rule-sets since the last boot. + +Show Firewall log +================= + +.. opcmd:: show log firewall +.. opcmd:: show log firewall ipv6 +.. opcmd:: show log firewall ipv6 [forward | input | output | name] +.. opcmd:: show log firewall ipv6 [forward | input | output] filter +.. opcmd:: show log firewall ipv6 name <name> +.. opcmd:: show log firewall ipv6 [forward | input | output] filter rule <rule> +.. opcmd:: show log firewall ipv6 name <name> rule <rule> + + Show the logs of all firewall; show all ipv6 firewall logs; show all logs + for particular hook; show all logs for particular hook and priority; show all logs + for particular custom chain; show logs for specific Rule-Set. + +Example Partial Config +====================== + +.. code-block:: none + + firewall { + group { + network-group BAD-NETWORKS { + network 198.51.100.0/24 + network 203.0.113.0/24 + } + network-group GOOD-NETWORKS { + network 192.0.2.0/24 + } + port-group BAD-PORTS { + port 65535 + } + } + ipv4 { + forward { + filter { + default-action accept + rule 5 { + action accept + source { + group { + network-group GOOD-NETWORKS + } + } + } + rule 10 { + action drop + description "Bad Networks" + protocol all + source { + group { + network-group BAD-NETWORKS + } + } + } + } + } + } + } + +Update geoip database +===================== + +.. opcmd:: update geoip + + Command used to update GeoIP database and firewall sets. diff --git a/docs/configuration/firewall/zone.rst b/docs/configuration/firewall/zone.rst index 0ae9ceef..1ab9c630 100644 --- a/docs/configuration/firewall/zone.rst +++ b/docs/configuration/firewall/zone.rst @@ -6,6 +6,10 @@ Zone Based Firewall ################### +******** +Overview +******** + .. note:: Starting from VyOS 1.4-rolling-202308040557, a new firewall structure can be found on all vyos instalations. Zone based firewall was removed in that version, but re introduced in VyOS 1.4 and 1.5. All @@ -18,6 +22,24 @@ Zone Based Firewall :doc:`legacy firewall configuration </configuration/firewall/general-legacy>` chapter. +In this section there's useful information of all firewall configuration that +is needed for zone-based firewall. +Configuration commands covered in this section: + +.. cfgcmd:: set firewall zone ... + +From main structure defined in +:doc:`Firewall Overview</configuration/firewall/index>` +in this section you can find detailed information only for the next part +of the general structure: + +.. code-block:: none + + - set firewall + * zone + - custom_zone_name + + ... + In zone-based policy, interfaces are assigned to zones, and inspection policy is applied to traffic moving between the zones and acted on according to firewall rules. A zone is a group of interfaces that have similar functions or |