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       nesting - shorewall6 Nested Zones




       In shorewall6-zones[1](5), a zone may be declared to be a sub-zone of
       one or more other zones using the above syntax.

       Where zones are nested, the CONTINUE policy in shorewall6-policy[2](5)
       allows hosts that are within multiple zones to be managed under the
       rules of all of these zones.



                   #ZONE    TYPE        OPTION
                   fw       firewall
                   net      ipv6
                   sam:net  ipv6
                   loc      ipv6


                   #ZONE     INTERFACE     BROADCAST     OPTIONS
                   -         eth0          detect        blacklist
                   loc       eth1          detect


                   #ZONE     HOST(S)                     OPTIONS
                   net       eth0:[::\]
                   sam       eth0:[2001:19f0:feee::dead:beef:cafe]


                   #SOURCE      DEST        POLICY       LOG LEVEL
                   loc          net         ACCEPT
                   sam          all         CONTINUE
                   net          all         DROP         info
                   all          all         REJECT       info

       The second entry above says that when Sam is the client, connection
       requests should first be processed under rules where the source zone is
       sam and if there is no match then the connection request should be
       treated under rules where the source zone is net. It is important that
       this policy be listed BEFORE the next policy (net to all). You can have
       this policy generated for you automatically by using the
       IMPLICIT_CONTINUE option in shorewall6.conf[3](5).

       Partial /etc/shorewall6/rules:

                   #ACTION   SOURCE    DEST                  PROTO    DEST PORT(S)
                   ACCEPT    sam       loc:2001:19f0:feee::3 tcp      ssh
                   ACCEPT    net       loc:2001:19f0:feee::5 tcp      www

       Given these two rules, Sam can connect with ssh to 2001:19f0:feee::3.
       Like all hosts in the net zone, Sam can connect to TCP port 80 on
       2001:19f0:feee::5. The order of the rules is not significant.








       shorewall6(8), shorewall6-accounting(5), shorewall6-actions(5),
       shorewall6-blacklist(5), shorewall6-hosts(5), shorewall6-interfaces(5),
       shorewall6-maclist(5), shorewall6-params(5), shorewall6-policy(5),
       shorewall6-providers(5), shorewall6-route_rules(5),
       shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5),
       shorewall6-tcclasses(5), shorewall6-tcdevices(5),
       shorewall6-tcrules(5), shorewall6-tos(5), shorewall6-tunnels(5),


        1. shorewall6-zones

        2. shorewall6-policy

        3. shorewall6.conf

[FIXME: source]                   06/17/2010