Daniel Pocock wrote:
I believe IAX is much closer to achieving this goal than SIP or H323, but Skype's protocol is more successful at getting through firewalls and NAT because of two things (which I openly admit I haven't verified myself, so please correct me if I've been mis informed):
- all connections go back through a Skype server with a real IP, even if calling user to user
- they can tunnel through HTTP proxies
Maybe we need to look at the possibility of IAX over HTTP and IAX over TCP?
It's actually much easier to do IAX over HTTP or IAX over TCP, with IAX, that it would be to do the same for SIP or H323 because of IAX's nat-friendliness.
I actually have a system that does this already, but it's not open-source. I think that you could use a zebedee tunnel (which is open-source) with IAX relatively easily, and then you'd get IAX over TCP with encryption. It's obviously not so good w.r.t. jitter, but it should work.
-SteveK
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