From 4855d0325c9adcf5fdcd028eab1a63bc7a7f9ccd Mon Sep 17 00:00:00 2001
From: adamdunkels <adamdunkels>
Date: Mon, 11 May 2009 07:01:54 +0000
Subject: [PATCH] Small script for setting up NAT on Ubuntu (probably works on
 other linuxen too)

---
 tools/setup-nat-ubuntu | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100755 tools/setup-nat-ubuntu

diff --git a/tools/setup-nat-ubuntu b/tools/setup-nat-ubuntu
new file mode 100755
index 000000000..8e9d8fe3d
--- /dev/null
+++ b/tools/setup-nat-ubuntu
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+# Run this script as root ("sudo ./setup-nat-ubuntu"). It has been tested on Ubunru 8.04.
+
+/sbin/iptables --table nat --append POSTROUTING --out-interface eth0 -j MASQUERADE
+/sbin/iptables --append FORWARD --in-interface tun0 -j ACCEPT
+
+/sbin/sysctl -w net.ipv4.conf.default.forwarding=1
+/sbin/sysctl -w net.ipv4.conf.all.forwarding=1
+
+/sbin/sysctl -w net.ipv4.ip_forward=1
+
+echo 1 > /proc/sys/net/ipv4/ip_forward
+