#!/bin/bash
#

## Firewall Script
#  01-07-26  by Erik Wegner
#  forwarding-up <InternalInterface> <ExternalInterface>
#

INT=$1  # Interface
EXT=$2  # Network

if test -z $1 || test -z $2 ; then
	echo "forwarding-up <InternalInterface> <ExternalInterface>"
	echo "e.g.: forwarding-up eth0 ippp0"
	exit 2
fi

# Pfad zu IPTables
if test -z $IPTABLES ; then
	IPTABLES=/usr/sbin/iptables
fi

## Ports
#  Nicht-privilegierte = 1024-65535
P_HIGH=1024:65535

echo "Forwarding $INT <-> $EXT..."

# ICMP

$IPTABLES -A FORWARD -o $EXT \
	-p ICMP --icmp-type echo-request \
	-j ACCEPT

