If I'm not wrong, I think MSN uses Net Meeting for chatting and if this is correct, you need the patch-o-matic patch for H323 to allow incoming H323 calls. The bad side to this is that it only supports 1 machine behind the firewall because you have to DNAT to a specified machine to receive any outside calls.. AFAIK, this is what I had to do for Net Meeting.. Thanks, ____________________________________________ George Vieira Systems Manager georgev@xxxxxxxxxxxxxxxxxxxxxx Citadel Computer Systems Pty Ltd http://www.citadelcomputer.com.au -----Original Message----- From: hare ram [mailto:hareram@xxxxxxxxxx] Sent: Tuesday, June 03, 2003 12:49 AM To: netfilter@xxxxxxxxxxxxxxx Subject: MSN Voice chat with Iptables Hi all Does any one have Good URL to work MSN Voice chat with IPTABLES+NAT thanks hare