NAME

       firehol-iptables - include custom iptables commands

SYNOPSIS

       iptables argument...

       ip6tables argument...

DESCRIPTION

       The  iptables and ip6tables helper commands pass all of their arguments to the real iptables(8) or ip6ta‐
       bles(8) at the appropriate point during run-time.

              Note

              When used in an interface or router, the result will not have a direct relationship to the enclos‐
              ing definition as the parameters passed are only those you supply.

       You should not use /sbin/iptables or /sbin/ip6tables directly in a FireHOL configuration as they will run
       before FireHOL activates its firewall.  This means that the commands are applied to the  previously  run‐
       ning firewall, not the new firewall, and will be lost when the new firewall is activated.

       The iptables and ip6tables helpers are provided to allow you to hook in commands safely.

       When using the -t option to specify a table, ensure this is the first option to iptables, otherwise “fast
       activation” will fail with an error message such as:

              iptables-restore: The -t option cannot be used in iptables-restore

EXAMPLES

       Fix LXC DHCP on same host:

              iptables -t mangle -A POSTROUTING -p udp --dport 68 -j CHECKSUM --checksum-fill

SEE ALSO

       • firehol(1) - FireHOL program

       • firehol.conf(5) - FireHOL configuration

       • 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 Documentation (http://firehol.org/documentation/)

AUTHORS

       FireHOL Team.

FireHOL Reference                               Built 24 Jan 2024                            firehol-iptables(5)