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diff --git a/docs/_static/images/firewall-netfilter.png b/docs/_static/images/firewall-netfilter.png Binary files differnew file mode 100644 index 00000000..dde3766b --- /dev/null +++ b/docs/_static/images/firewall-netfilter.png diff --git a/docs/_static/images/firewall-traditional.png b/docs/_static/images/firewall-traditional.png Binary files differnew file mode 100644 index 00000000..7eb2b49d --- /dev/null +++ b/docs/_static/images/firewall-traditional.png diff --git a/docs/_static/images/firewall-zonebased.png b/docs/_static/images/firewall-zonebased.png Binary files differnew file mode 100644 index 00000000..46b2f623 --- /dev/null +++ b/docs/_static/images/firewall-zonebased.png diff --git a/docs/configuration/firewall/general-legacy.rst b/docs/configuration/firewall/general-legacy.rst index 041dd8aa..5d235eb8 100644 --- a/docs/configuration/firewall/general-legacy.rst +++ b/docs/configuration/firewall/general-legacy.rst @@ -1,10 +1,10 @@ :lastproofread: 2021-06-29 -.. _firewall-legacy: +.. _legacy-firewall: -############### -Firewall-Legacy -############### +################################### +Firewall Configuration (Deprecated) +################################### .. note:: **Important note:** This documentation is valid only for VyOS Sagitta prior to diff --git a/docs/configuration/firewall/general.rst b/docs/configuration/firewall/general.rst index d2bc1435..3fe876f2 100644 --- a/docs/configuration/firewall/general.rst +++ b/docs/configuration/firewall/general.rst @@ -1,10 +1,10 @@ -:lastproofread: 2021-06-29 +:lastproofread: 2023-09-17 -.. _firewall: +.. _firewall-configuration: -######## -Firewall -######## +###################### +Firewall Configuration +###################### ******** Overview @@ -17,48 +17,41 @@ 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. -.. note:: **Important note on usage of terms:** - The firewall makes use of the terms `forward`, `input`, and `output` - for firewall policy. 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>`_ - - Main structure is shown next: .. code-block:: none - set firewall * global-options - + all-ping - + broadcast-ping - + ... + + all-ping + + broadcast-ping + + ... * group - - address-group - - ipv6-address-group - - network-group - - ipv6-network-group - - interface-group - - mac-group - - port-group - - domain-group + - address-group + - ipv6-address-group + - network-group + - ipv6-network-group + - interface-group + - mac-group + - port-group + - domain-group * ipv4 - - forward + - forward + filter - - input + - input + filter - - output + - output + filter - - name + - name + custom_name * ipv6 - - forward + - forward + filter - - input + - input + filter - - output + - output + filter - - ipv6-name + - ipv6-name + custom_name Where, main key words and configuration paths that needs to be understood: diff --git a/docs/configuration/firewall/index.rst b/docs/configuration/firewall/index.rst index 567e48a0..4b923143 100644 --- a/docs/configuration/firewall/index.rst +++ b/docs/configuration/firewall/index.rst @@ -1,24 +1,85 @@ +:lastproofread: 2023-09-17 + ######## Firewall ######## -Starting from VyOS 1.4-rolling-202308040557, a new firewall structure -can be found on all vyos installations. Documentation for most new firewall -cli can be found here: +.. attention:: + Starting from VyOS 1.4-rolling-202308040557, a new firewall structure + can be found on all vyos installations. + +.. note:: + The legacy and zone-based firewall configuration options is not longer + supported. They are here for reference purposes only. +Netfilter based +^^^^^^^^^^^^^^^ .. toctree:: :maxdepth: 1 :includehidden: general -Also, for those who haven't updated to newer version, legacy documentation is -still present and valid for all sagitta version prior to VyOS -1.4-rolling-202308040557: +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). + +To configure VyOS with the new :doc:`firewall configuration </configuration/firewall/general>` + +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. + +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. +.. figure:: /_static/images/firewall-netfilter.png + +.. 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: general-legacy + +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>` + +As the example image below shows, the device was configured with rules blocking +inbound or outbound traffic on each interface. + +.. figure:: /_static/images/firewall-traditional.png + +Zone-based firewall +^^^^^^^^^^^^^^^^^^^ +.. toctree:: + :maxdepth: 1 + :includehidden: + 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. + +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. + +.. figure:: /_static/images/firewall-zonebased.png diff --git a/docs/configuration/firewall/zone.rst b/docs/configuration/firewall/zone.rst index a2069e0d..38869c32 100644 --- a/docs/configuration/firewall/zone.rst +++ b/docs/configuration/firewall/zone.rst @@ -2,9 +2,9 @@ .. _firewall-zone: -################### -Zone Based Firewall -################### +################################ +Zone Based Firewall (Deprecated) +################################ .. note:: Starting from VyOS 1.4-rolling-202308040557, a new firewall structure can be found on all vyos instalations, and zone based firewall is |
