Provided by: firehol-doc_3.1.7+ds-2_all bug


       firehol-modifiers - select IPv4 or IPv6 mode


       ipv4 definition-or-command argument...

       ipv6 definition-or-command argument...

       [both] definition-or-command argument...


       When  preceded  by  a  modifier, any command or definition can be made to apply to IPv4 or
       IPv6 only.

       Without a modifier, interface and router definitions and commands that come before  either
       get applied to both IPv4 and IPV6.

       Commands  within  an  interface  or  router  assume  the  same  behaviour as the enclosing
       definition.  You cannot create an IPv4 command within an IPv6 interface or router nor IPv6
       within IPv4.


               interface eth0 myboth src4 src6 2001:DB8::/24
                 ipv4 server http accept
                 ipv6 server http accept

               ipv4 interface eth0 my4only src
                 server http accept

               ipv6 interface eth0 my6only src 2001:DB8::/24
                 server http accept

       Many  definitions  and  commands have explicitly named variants (such as router4, router6,
       router46) which can be used as shorthand.


firehol(1) - FireHOL program

       • firehol.conf(5) - FireHOL configuration

       • firehol-interface(5) - interface definition

       • firehol-router(5) - router definition

       • firehol-policy(5) - policy command

       • firehol-protection(5) - protection command

       • firehol-server(5) - server, route commands

       • firehol-client(5) - client command

       • firehol-group(5) - group command

       • firehol-iptables(5) - iptables helper

       • firehol-masquerade(5) - masquerade helper

       • FireHOL Website (

       • FireHOL Online PDF Manual (

       • FireHOL Online Documentation (


       FireHOL Team.