#!/bin/sh # Copyright (C) 2006 OpenWrt.org iptables -F input_rule iptables -F output_rule iptables -F forwarding_rule iptables -t nat -F prerouting_rule iptables -t nat -F postrouting_rule ### BIG FAT DISCLAIMER ## The "-i $WAN" is used to match packets that come in via the $WAN interface. ## it WILL NOT MATCH packets sent from the $WAN ip address -- you won't be able ## to see the effects from within the LAN. ### Open port to WAN ## -- This allows port 22 to be answered by (dropbear on) the router # iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 22 -j ACCEPT # iptables -A input_rule -i $WAN -p tcp --dport 22 -j ACCEPT ### Port forwarding ## -- This forwards port 8080 on the WAN to port 80 on 192.168.1.2 # iptables -t nat -A prerouting_rule -i $WAN -p tcp --dport 8080 -j DNAT --to 192.168.1.2:80 # iptables -A forwarding_rule -i $WAN -p tcp --dport 80 -d 192.168.1.2 -j ACCEPT ### DMZ ## -- Connections to ports not handled above will be forwarded to 192.168.1.2 # iptables -t nat -A prerouting_rule -i $WAN -j DNAT --to 192.168.1.2 # iptables -A forwarding_rule -i $WAN -d 192.168.1.2 -j ACCEPT