Just to let you know - the IETF has just created a new working group to look at NAT issues. If anyone on this list would like to join the mailing list the instructions are in the working group charter ( http://www.ietf.org/html.charters/nat-charter.html ) Following Annika's questions - if you have any worries or suggestions for the IETF WG to keep in mind relative to H.323 please send them to the NAT mailing list thanks Scott