router

router

#!/bin/bash

if [ "`id -u`" -eq 0 ]; then
  if [ "$2" ]; then
    INIF=$1
    OUTIF=$2
    iptables --table nat -I POSTROUTING 1 --out-interface $OUTIF -j MASQUERADE
    iptables -I FORWARD 1 --in-interface $INIF -j ACCEPT
    echo 1 > /proc/sys/net/ipv4/ip_forward
  else
    echo "Usage: $0 <input iface> <output iface (internet)>"
    exit 0
  fi
else
  echo "You must be root"
  exit 0
fi