Bugs item #2412241, was opened at 2008-12-09 20:06
Message generated for change (Comment added) made by mzabaluev
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Pekka Pessi (ppessi)
Assigned to: Pekka Pessi (ppessi)
Summary: Registration to Ekiga.net fails

Initial Comment:
The Ekiga.net checks during registration that both the Via and Contact headers 
contain a public IP address. The registation fails with 606 if the Via header 
contains a NATted address from the private address space.

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Comment By: Mikhail Zabaluev (mzabaluev)
Date: 2009-06-08 16:54

Message:
I reverse my stance from the earlier comments The modification of transport
address in Via may cause interoperability problems with proxies that
implement support for RFC 3581 and rely on the specified behavior for
NAT-aware policies.

The restriction imposed by the proxy is arbitrary. It does not follow any
specification or best practice published by IETF that I'm aware of. The
answer is, fix the proxy.

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Comment By: Andre Klapper (riot69)
Date: 2009-04-09 12:51

Message:
Maemo downstream ticket: https://bugs.maemo.org/show_bug.cgi?id=4259

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Comment By: Mikhail Zabaluev (mzabaluev)
Date: 2009-03-03 20:49

Message:
It shouldn't be an interop problem to put the public transport address in
the client's Via. When the binding breaks, the proxy should signal it with
rport and received which will be different from the address in Via.

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Comment By: Mikhail Zabaluev (mzabaluev)
Date: 2008-12-10 15:17

Message:
>The UA application must take care of the contact address by:
>-Using some kind of STUN mechanism
>- Learning from the REGISTER response ( checking the Via parameters ) and
reusing a new REGISTER

Sure, we do the latter, but the ekiga.net proxy rejects this REGISTER with
606 Not Acceptable.

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Comment By: Inca Rose (incarose)
Date: 2008-12-09 21:48

Message:
Why do you think this is a sofia-sip problem ?
There is nothing wrong whit that.
Ekiga SIP server will end up sending the response to the udp-src address
ignoring the Via host address.

The UA application must take care of the contact address by:
-Using some kind of STUN mechanism
- Learning from the REGISTER response ( checking the Via parameters ) and
reusing a new REGISTER
- or not taking care at all and failing to get incoming calls.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=756076&aid=2412241&group_id=143636

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