Thierry thak you for the comment. Quintum, whose hardware box we're thinking of using at the moment specifically states in the manual to disable all software firewall h.323 natting capabilities and claims that their hardware devices have native support for NATed environment and they also say that every software products they've seen that do NAT for h.323 really do not do a full job as per their opinion. We had an experience with another device by Polycom which claimed a native support for NAT as well however all our attempts to make it work in the NATed environment failed. So I am a litle confused here and really looking for a real world experience of having made it work. +------------------------------------------+ Yan Doldonov IT Consultant Seabak Outsourced IT Services www.seabak.net mail-to: yand@xxxxxxxxxx mobile: +99450 3271502 office: +99412 4972191 +------------------------------------------+ -----Original Message----- From: thierry itty [mailto:thierry.itty@xxxxxxxxxxxx] Sent: Thursday, 24 August, 2006 14:17 To: yand@xxxxxxxxxx Subject: Re: NATing h.323 protocol stack my 0.02$ the latest kernel (2-6-17) includes h323 natting stuff just modprobe the necessary modules at iptables startup Yan Doldonov a écrit : >Hello everyone! > >Has any one got experience of setting up the H.323 devices running NATed? >We have a taske where we need to setup the h.323 sessions to work over >a corporate VPN. Any comments or reference to useful literature I would >appreciate. >