#!/bin/sh

PATH=/sbin

WAN=eth1
LAN=eth0

#
# delete all existing rules.
#
iptables -F
iptables -t nat -F
iptables -t mangle -F
iptables -X

#Set Default Policy
#iptables -P INPUT DROP

# Always accept loopback traffic
iptables -A INPUT -i lo -j ACCEPT

# Allow established connections, and those not coming from the outside
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -m state --state NEW -i $LAN -j ACCEPT

iptables -A FORWARD -i $WAN -o $LAN -m state --state ESTABLISHED,RELATED -j ACCEPT
# Allow outgoing connections from the LAN side.
iptables -A FORWARD -i $LAN -o $WAN -j ACCEPT

# Masquerade.
iptables -t nat -A POSTROUTING -o $WAN -j MASQUERADE

# Don't forward from the outside to the inside.
# iptables -A FORWARD -i $WAN -o $LAN -j REJECT

# Enable routing.
echo 1 > /proc/sys/net/ipv4/ip_forward

#Set Default Policy
# Due to -P, not really needed now.
iptables -A INPUT -j DROP

### uTorrent
## -- These ports are forwarded to DBRF100
iptables -A PREROUTING -t nat -i $WAN -p tcp --dport 50000 -j DNAT --to 192.168.13.40:50000
iptables -A INPUT -p tcp -m state --state NEW --dport 50000 -i $WAN -j ACCEPT