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shorewall6-nesting

NAME

nesting - shorewall6 Nested Zones

SYNOPSIS

child-zone[:parent-zone[,parent-zone]...]

DESCRIPTION

In m[blue]shorewall6-zonesm[][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 m[blue]shorewall6-policym[][2](5) allows hosts that are within multiple zones to be managed under the rules of all of these zones.

EXAMPLE

/etc/shorewall6/zones:

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

/etc/shorewall6/interfaces:

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

/etc/shorewall6/hosts:

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

/etc/shorewall6/policy:

         #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 m[blue]shorewall6.confm[][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.

FILES

/etc/shorewall6/zones

/etc/shorewall6/interfaces

/etc/shorewall6/hosts

/etc/shorewall6/policy

/etc/shorewall6/rules

SEE ALSO

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), shorewall6-zones(5)

NOTES

1.

shorewall6-zones

http://www.shorewall.net/manpages6/shorewall-zones.html

2.

shorewall6-policy

http://www.shorewall.net/manpages6/shorewall6-policy.html

3.

shorewall6.conf

http://www.shorewall.net/manpages6/shorewall6.conf.html