#!/bin/bash

INTRAIP=192.168.0.249
INTIP=124.125.147.58

#Accept forwarding to intranet
iptables -A FORWARD -d $INTRAIP -p tcp --dport 80 -j ACCEPT

# Prerouting destination nat rule to local network from internet ip

iptables -t nat -A PREROUTING -i eth0 -p tcp -d $INTIP --dport 80 -j DNAT --to-destination $INTRAIP 

# Postrouting source nat rule

iptables -t nat -A POSTROUTING -d $INTIP -p tcp --dport 80 -j SNAT --to-source $INTRAIP