Stuff

#!/bin/bash

IPT=`which iptables`

$IPT -F
$IPT -Z
$IPT -X
$IPT -F -t nat
$IPT -Z -t nat
$IPT -X -t nat
$IPT -t nat -P PREROUTING ACCEPT
$IPT -t nat -P POSTROUTING ACCEPT
$IPT -t nat -P OUTPUT ACCEPT
$IPT -F -t mangle
$IPT -Z -t mangle
$IPT -X -t mangle
$IPT -t mangle -P PREROUTING ACCEPT
$IPT -t mangle -P OUTPUT ACCEPT
$IPT -t mangle -P INPUT ACCEPT 2>/dev/null >/dev/null
$IPT -t mangle -P FORWARD DROP 2>/dev/null >/dev/null
$IPT -t mangle -P POSTROUTING ACCEPT 2>/dev/null >/dev/null
$IPT -P INPUT ACCEPT
$IPT -P OUTPUT ACCEPT
$IPT -P FORWARD DROP