NAME

       interfaces-forward - forwarding vocabulary for the interfaces(5) file format

DESCRIPTION

       Linux allows for configuration of IP packet forwarding behavior on a protocol and
       interface basis.  The following options allow for this configuration.

FORWARDING-RELATED OPTIONS

       The forward executor will only modify the sysctl configuration if these options are
       provided, otherwise other mechanisms such as /etc/sysctl.conf may be used.

       forward-ipv4 yes|no
           Whether the interface should forward unicast IPv4 packets.

       forward-ipv6 yes|no
           Whether the interface should forward unicast IPv6 packets.

       forward-ipv4-mc yes|no
           Whether the interface should forward multicast IPv4 packets.

       forward-ipv6-mc yes|no
           Whether the interface should forward multicast IPv6 packets.

EXAMPLES

       The typical home router scenario will want to forward both IPv4 and IPv6 packets:

           iface WAN
                use dhcp
                forward-ipv4 yes
                forward-ipv6 yes

           iface LAN
                address 192.168.0.1/24
                forward-ipv4 yes
                forward-ipv6 yes

AUTHORS

       Ariadne Conill <ariadne@dereferenced.org>

                                            2024-08-02                      interfaces-forward(5)