I'm kinda new at this iptables thing. I've been running into a problem with trying to NAT for a class C subnetted class A network...i.e. 10.168.1.0/24. The syntax I've been using is as follows -- $ipt -t nat -A POSTROUTING -o $outside -j SNAT -to-source $lan, with the variable $lan = "10.168.1.0/24". Everytime I've ran the script I get the following error <iptables v.x.x.x Bad IP Address. Can anyone please help me with the proper syntax to make this work? I've tried various options such the one above, also including the whole subnetmask and playing around with different delimitation options, nothing seems to work. Michael "Thad" Irvin Lead Analyst - Internet Engineering Citibank Cards Technology 904.954.2213 michael.irvin@xxxxxxxxxxxx