Thanks Antony, According to your explanations I think I 'd rather to include the following line in my iptable script : iptables -A POSTROUTING -t nat -o eth2 -j SNAT --to 62.160.X.Y But to be sure : I've got two computers on my DMZ which have IP included in 192.168.2.0/255.255.255.0 and other computers on my LAN which have IP included in 172.16.0.0/255.255.0.0 and static public IP on my WAN Firewall. So the best way is to use the line you advice me ? Where on my script do I have to add this line ? At the beginning, just after a modprobe iptable_nat line ? Last question : Do you see some clumsy things or errors in my script ? Unfortunately I think there are .... ;-( Thanks again for your help Frederic
