NAME

       exclusion - Exclude a set of hosts from a definition in a shorewall6 configuration file.

SYNOPSIS

       !address-or-range[,address-or-range]...

       !zone-name[,zone-name]...

DESCRIPTION

       Exclusion is used when you wish to exclude one or more addresses from a definition. An
       exclamation point is followed by a comma-separated list of addresses. The addresses may be
       single host addresses (e.g., fe80::2a0:ccff:fedb:31c4) or they may be network addresses in
       CIDR format (e.g., fe80::2a0:ccff:fedb:31c4/64). If your kernel and ip6tables include
       iprange support, you may also specify ranges of ip addresses of the form
       lowaddress-highaddress

       No embedded white-space is allowed.

       Exclusion can appear after a list of addresses and/or address ranges. In that case, the
       final list of address is formed by taking the first list and then removing the addresses
       defined in the exclusion.

       Beginning in Shorewall 4.4.13, the second form of exclusion is allowed after all and any
       in the SOURCE and DEST columns of /etc/shorewall/rules. It allows you to omit arbitrary
       zones from the list generated by those key words.

           Warning
           If you omit a sub-zone and there is an explicit or explicit CONTINUE policy, a
           connection to/from that zone can still be matched by the rule generated for a parent
           zone.

           For example:

           /etc/shorewall6/zones:

               #ZONE          TYPE
               z1             ip
               z2:z1          ip
               ...

           /etc/shorewall6/policy:

               #SOURCE         DEST          POLICY
               z1              net           CONTINUE
               z2              net           REJECT

           /etc/shorewall6/rules:

               #ACTION         SOURCE        DEST        PROTO         DEST
               #                                                       PORT(S)
               ACCEPT          all!z2        net         tcp           22

           In this case, SSH connections from z2 to net will be accepted by the generated z1 to
           net ACCEPT rule.

FILES

       /etc/shorewall6/hosts

       /etc/shorewall6/masq

       /etc/shorewall6/rules

       /etc/shorewall6/tcrules

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),
       shorewall-zones(5)