[OpenWrt Wiki] Firewall and network interfaces
openwrt.org › docs › guide-userSep 09, 2021 · Firewall and network interfaces The goal of a router is to forward packet streams from incoming network interfaces to outgoing network interfaces. Firewall rules add another layer of granularity to what is allowed to be forwarded across interfaces - and additionally which packets are allowed to be inputted to, and outputted from, the router itself.