> Christian Huitema wrote: > STUN is indeed a great protocol, with all the right > authors, but it makes a couple of assumptions about the > type of NATs and about the structure of the network. Indeed, but its assumptions are well in line with the predicted clientele: home/soho. We were talking about SIP; enterprises do not have too much of a problem with SIP and NAT, because a) they have a somehow knowledgeable staff b) they can deploy gateways/proxies/whatever at the edge of their network, where NAT occurs. If SIPPhone and FWD can deploy SIP proxies, so can Microsoft, Cisco, and a bunch of others. SIPPhone, FWD and consorts do already connect together and there are beta tests to connect private Call Manager domains to them. Michel.