[OpenSER-Devel] [ openser-Feature Requests-1796161 ] I-D sip-outbound support

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Feature Requests item #1796161, was opened at 2007-09-17 04:55
Message generated for change (Comment added) made by nobody
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Category: core
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Toni Heinonen (t_m_heinonen)
Assigned to: Nobody/Anonymous (nobody)
Summary: I-D sip-outbound support

Initial Comment:
The most important standard for SIP signalling NAT traversal (as opposed to RTP media problems) is the upcoming Internet-Draft sip-outbound, ie. http://tools.ietf.org/id/draft-ietf-sip-outbound-02.txt

It basically asks the SIP proxy to keep the TCP connection alive that was used for the initial registration, and use that for signalling. Keepalives are used, either TCP, in-line or STUN requests.

OpenSER has great NAT traversal functionality, but proxy-side hacking can't be the long term solution. This seems to be it, and the draft is almost ready.

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Comment By: Nobody/Anonymous (nobody)
Date: 2007-09-17 05:06

Message:
Logged In: NO 

openser does use tcp connection that sip ua has established for signaling
towards that ua.
if sip ua uses tcp, then it is up that sip ua to keep the tcp connection
alive.  nokia n90
series, for example, do so as should any sip ua that supports tcp.  so
there is nothing
missing from openser regarding nat traversal of tcp sip uas.

-- juha

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