shorewall6-nesting man page

nesting — shorewall6 Nested Zones

Synopsis

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

Description

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. The child-zone may be neither the firewall zone nor a vserver zone. The firewall zone may not appear as a parent zone, although all vserver zones are handled as sub-zones of the firewall zone.

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.

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 shorewall6.conf[3](5).

Partial /etc/shorewall6/rules:

#ACTION   SOURCE    DEST                  PROTO    DPORT
...
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-netmap(5),shorewall6-params(5), shorewall6-policy(5), shorewall6-providers(5), shorewall6-rtrules(5), shorewall6-routestopped(5), shorewall6-rules(5), shorewall6.conf(5), shorewall6-secmarks(5), shorewall6-tcclasses(5), shorewall6-tcdevices(5), shorewall6-mangle(5), shorewall6-tos(5), shorewall6-tunnels(5), shorewall6-zones(5)

Notes

1.

shorewall6-zones

2.

shorewall6-policy

3.

shorewall6.conf

Referenced By

shorewall6-proxyndp(5).

11/04/2016 Configuration Files Configuration Files