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openwrt-xburst/obsolete-buildroot/sources/openwrt/root/etc/init.d/S45firewall
mbm 6500719d9c wap54g support
separate S50services into individual files
move nvram_get to 'nvram get' making nvram overrides more transparent


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@155 3c298f89-4303-0410-b956-a3cf2f4a3e73
2004-09-07 05:54:07 +00:00

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#!/bin/sh
. /etc/functions.sh
WAN=$(nvram get wan_ifname)
IPT=/usr/sbin/iptables
for T in filter nat mangle ; do
$IPT -t $T -F
$IPT -t $T -X
done
$IPT -t filter -A INPUT -m state --state INVALID -j DROP
$IPT -t filter -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPT -t filter -A INPUT -p icmp -j ACCEPT
$IPT -t filter -A INPUT -i $WAN -p tcp -j REJECT --reject-with tcp-reset
$IPT -t filter -A INPUT -i $WAN -j REJECT --reject-with icmp-port-unreachable
$IPT -t filter -A FORWARD -m state --state INVALID -j DROP
$IPT -t filter -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
$IPT -t filter -A FORWARD -i $WAN -m state --state NEW,INVALID -j DROP
$IPT -t filter -A FORWARD -o $WAN -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
$IPT -t nat -A POSTROUTING -o $WAN -j MASQUERADE