iptables FORWARD and INPUT

Question

I have a home network with Linux pc\'s, which all had iptables running. I think it is easier to put my LAN behind a Linux gateway/firewall, so I\'ve put a pc (with fedora,no gui

Answer 1

INPUT, FORWARD, and OUTPUT are separate. A packet will only hit one of the three chains.

If the destination is to this server, it hits the INPUT chain. If its source is from this server, it hits OUTPUT. If its source and destination are both other machines—it's being routed through the server—then it hits the FORWARD chain.