#!/bin/sh
+# Copyright (C) 2006 OpenWrt.org
## Please make changes in /etc/firewall.user
-. /etc/config/network
-WAN="$wan_ifname"
-LAN="$lan_ifname"
+. /etc/functions.sh
+include network
+
+scan_interfaces
+config_get WAN wan ifname
+config_get LAN lan ifname
## CLEAR TABLES
for T in filter nat; do
iptables -A INPUT -j input_rule
# allow
- [ -z "$WAN" ] || iptables -A INPUT -i \! $WAN -j ACCEPT # allow from lan/wifi interfaces
+ iptables -A INPUT ${WAN:+-i \! $WAN} -j ACCEPT # allow from lan/wifi interfaces
iptables -A INPUT -p icmp -j ACCEPT # allow ICMP
iptables -A INPUT -p gre -j ACCEPT # allow GRE