On Jul 29, 2008, at 4:17 PM, Alan Johnston wrote:
Bruce Lowekamp wrote:
The current draft does not specify sending SIP messages through
tunnels. Such a specification would absolutely have to address
that issue.
I am very surprised by the removal of this. Was this just done to
avoid dealing with the security and transport issues or was it felt
that there was no value in it?
If we are unable to route SIP messages over the overlay, then the
overlay is effectively not providing a last resort rendezvous
functionality that we have with CS SIP.
So the only alternative seems to be for every peer to reserve and
use TURN candidates every time a SIP connection is established.
Otherwise, in the perhaps 15% of cases where a relay is needed, the
SIP connection will fail.
I'm very concerned that we have not fully thought through this usage
of TURN for both SIP and media...
I have to admit that I'm scratching my head and wondering about this
one too.
--
Dean
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