#!/bin/sh

PATH=/usr/sbin:/sbin:/bin:/usr/bin

start(){
	iptables -A INPUT -i lo -j ACCEPT
	iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
	iptables -A INPUT -m state --state NEW -i ! eth1 -j ACCEPT
	iptables -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT
	iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT
	iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
	iptables -A FORWARD -i eth1 -o eth1 -j REJECT
	iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -j REDIRECT --to-port 8080	
	echo 1 > /proc/sys/net/ipv4/ip_forward
	}
stop(){
	iptables -P FORWARD DROP
	iptables -F
	iptables -t nat -F
	iptables -t mangle -F
	iptables -X
	}


case "$1" in
    start)
        echo -n "Starting Firewall: "
        start
        echo "Firewall."
        ;;
    stop)
        echo -n "Stopping Firewall: "
        stop
        ;;
    
    restart)
        echo -n "Restarting Firewall: "
        stop
        start
        echo "firewall."
        ;;
    *)
        echo "Usage: /etc/init.d/firewall {start|stop|restart}"
        exit 3
        ;;
esac

exit 0