interfaces-forward(5)

📦
version 0.13.0 · 7 versions
, in alpine 3.24

🌸 NAME 🌸

okay bestie, meet interfaces-forward — it's the forwarding vocabulary for the interfaces(5) file format, and it's giving very “section 5, File Formats Manual” energy. 🫶

✨ DESCRIPTION ✨

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

ngl, 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> — the author, the icon, the legend. 💖

and that's the whole page, bestie 🫶 source/version: File Formats Manual · page/version: interfaces-forward(5) · date: 2026-05-10. byeee, go forward (the packet kind) 💅✨

📦 where this page comes from