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Re: Update on Google talk
- To: or-talk@xxxxxxxxxxxxx
- Subject: Re: Update on Google talk
- From: Adam Langley <alangley@xxxxxxxxx>
- Date: Thu, 25 Aug 2005 17:50:30 +0100
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On 8/25/05, Matt Thorne <mlthorne@xxxxxxxxx> wrote:
> Don't know about other VOIP's but jabber compliant programs use XMPP
> which creates TCP connections.
>
> google talk uses port 5222
Certainly the messaging parts of XMPP use TLS over TCP. But the actual
VoIP is almost certainly going to be a UDP session using the TCP to
bootstrap.
However, since NATs have broken end-to-end addressing you'll probably
find that gtalk will use a TCP session for VoIP as a last resort to
cope with evil firewalls. So it might all work yet ;)
AGL
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Adam Langley agl@xxxxxxxxxxxxxxxxxx
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