H.323 is what you get when you let telecommunications engineers design network communication protocols. :) It is in no way what-so-ever designed with NAT in mind, thus there is almost no support for it last time I checked, but from memory: There were nat modules for 2.2 kernels that kinda worked, if you stood on your head and did some voodoo. Modules for 2.4 kernels were kinda under development, but not in the kernels or in the offical iptables release. OpenH323.org had a proxy thing that I never got to work. Maybe they have something more useful now. I'd start here for resources. -- Andrew S. Zbikowski | http://www.ringworld.org "The irony is that Bill Gates claims to be making a stable operating system and Linus Torvalds claims to be trying to take over the world."