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NAME

       firehol-action - set up custom filter actions

SYNOPSIS

       action chain name action

DESCRIPTION

       The  action  helper  command creates an iptables(8) chain which can be used to control the
       action of other firewall rules once the firewall is running.

       For example, you can setup the custom action ACT1, which by default is ACCEPT, but can  be
       dynamically changed to DROP, REJECT or RETURN (and back) without restarting the firewall.

       The  name  can be any chain name accepted by iptables.  You should try to keep it within 5
       and 10 characters.

              Note

              The names created with this command are case-sensitive.

       The action can be any of  those  supported  by  FireHOL  (see  firehol-actions(5)).   Only
       ACCEPT, REJECT, DROP, RETURN have any meaning in this instance.

EXAMPLES

       To create a custom chain and have some rules use it:

              action chain ACT1 accept

              interface any world
                  server smtp ACT1
                  client smtp ACT1

       Once  the  firewall  is running you can dynamically modify the behaviour of the chain from
       the Linux command-line, as detailed below:

       To insert a DROP action at the start of the chain to override the default action (ACCEPT):

              iptables -t filter -I ACT1 -j DROP

       To delete the DROP action from the start of the chain to return to the default action:

              iptables -t filter -D ACT1 -j DROP

              Note

              If you delete all of the rules in the chain, the default  will  be  to  RETURN,  in
              which  case  the behaviour will be as if any rules with the action were not present
              in the configuration file.

       You can also create multiple chains simultaneously.  To create 3 ACCEPT and 3 DROP  chains
       you can do the following:

              action chain "ACT1 ACT2 ACT3" accept
              action chain "ACT4 ACT5 ACT6" drop

SEE ALSO

       · firehol(1) - FireHOL program

       · firehol.conf(5) - FireHOL configuration

       · firehol-actions(5) - optional rule parameters

       · iptables(8)  (http://ipset.netfilter.org/iptables.man.html)  -  administration  tool for
         IPv4 firewalls

       · ip6tables(8) (http://ipset.netfilter.org/ip6tables.man.html) - administration  tool  for
         IPv6 firewalls

       · FireHOL Website (http://firehol.org/)

       · FireHOL Online PDF Manual (http://firehol.org/firehol-manual.pdf)

       · FireHOL Online HTML Manual (http://firehol.org/manual)

AUTHORS

       FireHOL Team.