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-.. _examples-zone-policy:
-
-Zone-Policy example
--------------------
-
-Native IPv4 and IPv6
-^^^^^^^^^^^^^^^^^^^^
-
-We have three networks.
-
-.. code-block:: none
-
-  WAN - 172.16.10.0/24, 2001:0DB8:0:9999::0/64
-  LAN - 192.168.100.0/24, 2001:0DB8:0:AAAA::0/64
-  DMZ - 192.168.200.0/24, 2001:0DB8:0:BBBB::0/64
-
-
-**This specific example is for a router on a stick, but is very easily
-adapted for however many NICs you have**:
-
-
-* Internet - 192.168.200.100 - TCP/80
-* Internet - 192.168.200.100 - TCP/443
-* Internet - 192.168.200.100 - TCP/25
-* Internet - 192.168.200.100 - TCP/53
-* VyOS actis as DHCP, DNS forwarder, NAT, router and firewall.
-* 192.168.200.200/2001:0DB8:0:BBBB::200 is an internal/external DNS, web
-  and mail (SMTP/IMAP) server.
-* 192.168.100.10/2001:0DB8:0:AAAA::10 is the administrator's console. It
-  can SSH to VyOS.
-* LAN and DMZ hosts have basic outbound access: Web, FTP, SSH.
-* LAN can access DMZ resources.
-* DMZ cannot access LAN resources.
-* Inbound WAN connect to DMZ host.
-
-.. image:: /_static/images/zone-policy-diagram.png
-   :width: 80%
-   :align: center
-   :alt: Network Topology Diagram
-
-The VyOS interface is assigned the .1/:1 address of their respective
-networks. WAN is on VLAN 10, LAN on VLAN 20, and DMZ on VLAN 30.
-
-It will look something like this:
-
-.. code-block:: none
-
-  interfaces {
-      ethernet eth0 {
-          duplex auto
-          hw-id 00:53:ed:6e:2a:92
-          smp_affinity auto
-          speed auto
-          vif 10 {
-              address 172.16.10.1/24
-              address 2001:db8:0:9999::1/64
-          }
-          vif 20 {
-              address 192.168.100.1/24
-              address 2001:db8:0:AAAA::1/64
-          }
-          vif 30 {
-              address 192.168.200.1/24
-              address 2001:db8:0:BBBB::1/64
-          }
-      }
-      loopback lo {
-      }
-  }
-
-
-Zones Basics
-^^^^^^^^^^^^
-
-Each interface is assigned to a zone. The interface can be physical or
-virtual such as tunnels (VPN, PPTP, GRE, etc) and are treated exactly
-the same.
-
-Traffic flows from zone A to zone B. That flow is what I refer to as a
-zone-pair-direction. eg. A->B and B->A are two zone-pair-destinations.
-
-Ruleset are created per zone-pair-direction.
-
-I name rule sets to indicate which zone-pair-direction they represent.
-eg. ZoneA-ZoneB or ZoneB-ZoneA. LAN-DMZ, DMZ-LAN.
-
-In VyOS, you have to have unique Ruleset names. In the event of overlap,
-I add a "-6" to the end of v6 rulesets. eg. LAN-DMZ, LAN-DMZ-6. This
-allows for each auto-completion and uniqueness.
-
-In this example we have 4 zones. LAN, WAN, DMZ, Local. The local zone is
-the firewall itself.
-
-If your computer is on the LAN and you need to SSH into your VyOS box,
-you would need a rule to allow it in the LAN-Local ruleset. If you want
-to access a webpage from your VyOS box, you need a rule to allow it in
-the Local-LAN ruleset.
-
-In rules, it is good to keep them named consistently. As the number of
-rules you have grows, the more consistency you have, the easier your
-life will be.
-
-.. code-block:: none
-
-  Rule 1 - State Established, Related
-  Rule 2 - State Invalid
-  Rule 100 - ICMP
-  Rule 200 - Web
-  Rule 300 - FTP
-  Rule 400 - NTP
-  Rule 500 - SMTP
-  Rule 600 - DNS
-  Rule 700 - DHCP
-  Rule 800 - SSH
-  Rule 900 - IMAPS
-
-The first two rules are to deal with the idiosyncrasies of VyOS and
-iptables.
-
-Zones and Rulesets both have a default action statement. When using
-Zone-Policies, the default action is set by the zone-policy statement
-and is represented by rule 10000.
-
-It is good practice to log both accepted and denied traffic. It can save
-you significant headaches when trying to troubleshoot a connectivity
-issue.
-
-To add logging to the default rule, do:
-
-.. code-block:: none
-
-  set firewall name <ruleSet> enable-default-log
-
-
-By default, iptables does not allow traffic for established session to
-return, so you must explicitly allow this. I do this by adding two rules
-to every ruleset. 1 allows established and related state packets through
-and rule 2 drops and logs invalid state packets. We place the
-established/related rule at the top because the vast majority of traffic
-on a network is established and the invalid rule to prevent invalid
-state packets from mistakenly being matched against other rules. Having
-the most matched rule listed first reduces CPU load in high volume
-environments. Note: I have filed a bug to have this added as a default
-action as well.
-
-''It is important to note, that you do not want to add logging to the
-established state rule as you will be logging both the inbound and
-outbound packets for each session instead of just the initiation of the
-session. Your logs will be massive in a very short period of time.''
-
-In VyOS you must have the interfaces created before you can apply it to
-the zone and the rulesets must be created prior to applying it to a
-zone-policy.
-
-I create/configure the interfaces first. Build out the rulesets for each
-zone-pair-direction which includes at least the three state rules. Then
-I setup the zone-policies.
-
-Zones do not allow for a default action of accept; either drop or
-reject. It is important to remember this because if you apply an
-interface to a zone and commit, any active connections will be dropped.
-Specifically, if you are SSH’d into VyOS and add local or the interface
-you are connecting through to a zone and do not have rulesets in place
-to allow SSH and established sessions, you will not be able to connect.
-
-The following are the rules that were created for this example (may not
-be complete), both in IPv4 and IPv6. If there is no IP specified, then
-the source/destination address is not explicit.
-
-.. code-block:: none
-
-  WAN – DMZ:192.168.200.200 – tcp/80
-  WAN – DMZ:192.168.200.200 – tcp/443
-  WAN – DMZ:192.168.200.200 – tcp/25
-  WAN – DMZ:192.168.200.200 – tcp/53
-  WAN – DMZ:2001:0DB8:0:BBBB::200 – tcp/80
-  WAN – DMZ:2001:0DB8:0:BBBB::200 – tcp/443
-  WAN – DMZ:2001:0DB8:0:BBBB::200 – tcp/25
-  WAN – DMZ:2001:0DB8:0:BBBB::200 – tcp/53
-
-  DMZ - Local - tcp/53
-  DMZ - Local - tcp/123
-  DMZ - Local - tcp/67,68
-
-  LAN - Local - tcp/53
-  LAN - Local - tcp/123
-  LAN - Local - tcp/67,68
-  LAN:192.168.100.10 - Local - tcp/22
-  LAN:2001:0DB8:0:AAAA::10 - Local - tcp/22
-
-  LAN - WAN - tcp/80
-  LAN - WAN - tcp/443
-  LAN - WAN - tcp/22
-  LAN - WAN - tcp/20,21
-
-  DMZ - WAN - tcp/80
-  DMZ - WAN - tcp/443
-  DMZ - WAN - tcp/22
-  DMZ - WAN - tcp/20,21
-  DMZ - WAN - tcp/53
-  DMZ - WAN - udp/53
-
-  Local - WAN - tcp/80
-  Local - WAN - tcp/443
-  Local - WAN - tcp/20,21
-
-  Local - DMZ - tcp/25
-  Local - DMZ - tcp/67,68
-  Local - DMZ - tcp/53
-  Local - DMZ - udp/53
-
-  Local - LAN - tcp/67,68
-
-  LAN - DMZ - tcp/80
-  LAN - DMZ - tcp/443
-  LAN - DMZ - tcp/993
-  LAN:2001:0DB8:0:AAAA::10 - DMZ:2001:0DB8:0:BBBB::200 - tcp/22
-  LAN:192.168.100.10 - DMZ:192.168.200.200 - tcp/22
-
-Since we have 4 zones, we need to setup the following rulesets.
-
-.. code-block:: none
-
-  Lan-wan
-  Lan-local
-  Lan-dmz
-  Wan-lan
-  Wan-local
-  Wan-dmz
-  Local-lan
-  Local-wan
-  Local-dmz
-  Dmz-lan
-  Dmz-wan
-  Dmz-local
-
-Even if the two zones will never communicate, it is a good idea to
-create the zone-pair-direction rulesets and set enable-default-log. This
-will allow you to log attempts to access the networks. Without it, you
-will never see the connection attempts.
-
-This is an example of the three base rules.
-
-.. code-block:: none
-
-  name wan-lan {
-    default-action drop
-    enable-default-log
-    rule 1 {
-      action accept
-      state {
-        established enable
-        related enable
-      }
-    }
-    rule 2 {
-      action drop
-      log enable
-      state {
-        invalid enable
-      }
-    }
-  }
-
-
-Here is an example of an IPv6 DMZ-WAN ruleset.
-
-.. code-block:: none
-
-  ipv6-name dmz-wan-6 {
-    default-action drop
-    enable-default-log
-    rule 1 {
-      action accept
-      state {
-        established enable
-        related enable
-      }
-    }
-    rule 2 {
-      action drop
-      log enable
-      state {
-        invalid enable
-    }
-    rule 100 {
-      action accept
-      log enable
-      protocol ipv6-icmp
-    }
-    rule 200 {
-      action accept
-      destination {
-        port 80,443
-      }
-      log enable
-      protocol tcp
-    }
-    rule 300 {
-      action accept
-      destination {
-        port 20,21
-      }
-      log enable
-      protocol tcp
-    }
-    rule 500 {
-      action accept
-      destination {
-        port 25
-      }
-      log enable
-      protocol tcp
-      source {
-        address 2001:db8:0:BBBB::200
-      }
-    }
-    rule 600 {
-      action accept
-      destination {
-        port 53
-      }
-      log enable
-      protocol tcp_udp
-      source {
-        address 2001:db8:0:BBBB::200
-      }
-    }
-    rule 800 {
-      action accept
-      destination {
-      port 22
-      }
-      log enable
-      protocol tcp
-    }
-  }
-
-Once you have all of your rulesets built, then you need to create your
-zone-policy.
-
-Start by setting the interface and default action for each zone.
-
-.. code-block:: none
-
-  set zone-policy zone dmz default-action drop
-  set zone-policy zone dmz interface eth0.30
-
-In this case, we are setting the v6 ruleset that represents traffic
-sourced from the LAN, destined for the DMZ. Because the zone-policy
-firewall syntax is a little awkward, I keep it straight by thinking of
-it backwards.
-
-.. code-block:: none
-
-  set zone-policy zone dmz from lan firewall ipv6-name lan-dmz-6
-
-DMZ-LAN policy is LAN-DMZ. You can get a rhythm to it when you build out
-a bunch at one time.
-
-In the end, you will end up with something like this config. I took out
-everything but the Firewall, Interfaces, and zone-policy sections. It is
-long enough as is.
-
-
-IPv6 Tunnel
-^^^^^^^^^^^
-
-If you are using a IPv6 tunnel from HE.net or someone else, the basis is
-the same except you have two WAN interface. One for v4 and one for v6.
-
-You would have 5 zones instead of just 4 and you would configure your v6
-ruleset between your tunnel interface and your LAN/DMZ zones instead of
-to the WAN.
-
-LAN, WAN, DMZ, local and TUN (tunnel)
-
-v6 pairs would be:
-
-.. code-block:: none
-
-  lan-tun
-  lan-local
-  lan-dmz
-  tun-lan
-  tun-local
-  tun-dmz
-  local-lan
-  local-tun
-  local-dmz
-  dmz-lan
-  dmz-tun
-  dmz-local
-
-Notice, none go to WAN since WAN wouldn't have a v6 address on it.
-
-You would have to add a couple of rules on your wan-local ruleset to
-allow protocol 41 in.
-
-Something like:
-
-.. code-block:: none
-
-  rule 400 {
-    action accept
-    destination {
-      address 172.16.10.1
-    }
-    log enable
-    protocol 41
-    source {
-      address ip.of.tunnel.broker
-    }
-  }
-