From fee8556c06c10bfed0af070b604f47554a24306f Mon Sep 17 00:00:00 2001
From: Mike Baker <mbm@openwrt.org>
Date: Sun, 28 Mar 2004 00:20:21 +0000
Subject: inital commit of 20040316

SVN-Revision: 4
---
 root/etc/firewall.sh | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100755 root/etc/firewall.sh

(limited to 'root/etc/firewall.sh')

diff --git a/root/etc/firewall.sh b/root/etc/firewall.sh
new file mode 100755
index 0000000..805aa3f
--- /dev/null
+++ b/root/etc/firewall.sh
@@ -0,0 +1,26 @@
+#!/bin/sh
+
+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 
+$IPT -t filter -A INPUT -i vlan1 -p tcp -j REJECT --reject-with tcp-reset 
+$IPT -t filter -A INPUT -i vlan1 -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 
+$IPT -t filter -A FORWARD -i vlan1 -m state --state NEW,INVALID -j DROP
+
+$IPT -t nat -A POSTROUTING -o vlan1 -j MASQUERADE
+
+echo "1"   >/proc/sys/net/ipv4/ip_forward
+echo "1"   >/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
+echo "1"   >/proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
+echo "30"  >/proc/sys/net/ipv4/tcp_fin_timeout
+echo "120" >/proc/sys/net/ipv4/tcp_keepalive_time
+echo "0"   >/proc/sys/net/ipv4/tcp_timestamps
-- 
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