Someone

#!/bin/sh

echo -e "\n\nLoading sh.flixil.firewall-iptables..\n"


IPTABLES=/sbin/iptables
EXTIF="wlan0"
INTIF="eth0"
echo "   External Interface:  $EXTIF"
echo "   Internal Interface:  $INTIF"



$IPTABLES -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
$IPTABLES -A FORWARD -i $INTIF -o $EXTIF -j ACCEPT
$IPTABLES -A FORWARD -j LOG

echo 1 > /proc/sys/net/ipv4/ip_forward

echo "   Enabling SNAT (MASQUERADE) functionality on $EXTIF"
$IPTABLES -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE

echo -e "\nflixil.firewall-iptables  done.\n"