10 Nov
2005
10 Nov
'05
5:26 p.m.
Depends on your SIP Server. You say nothing about it. Is it SER? Something
else? You need to route all messages to SER Proxy to make sure that things
go through a NAT. Is this to get rid of the NAT problem that "SIP Server"
cannot do?
g-)
----- Original Message -----
From: "Anthony Chapellier" <anthony(a)mbdsys.com>
To: "Greger V. Teigre" <greger(a)teigre.com>om>;
<serusers(a)lists.iptel.org>
Sent: Thursday, November 10, 2005 12:54 PM
Subject: Re: [Serusers] Rewriting SDP Infos for NAT Traversal
I saw the config files examples and adapted one of them
with my own
configuration because I need to use SER Proxy as a simple proxy which
support NAT traversal... To process REGISTER requests or INVITE requests, I
got a SIP¨Server on another entity.
The scheme for my problem is the following :
UAC 1 ------ \
\
|------- NAT ---- SER Proxy ---- SIP Server
/
UAC 2 ------ /
REGISTER requests from UAC1 and UAC2 are processing correctly to SIP
Serever via SER Proxy. But when I'm trying to do a call from UAC1 to UAC2,
things are going bad.
Indeed, the first INVITE request from UAC1 is going to SIP Server via SER
Proxy but when SIP Server process the INVITE request, he's trying to
forward the INVITE Request directly to UAC2 without passing by SER
Proxy...
The result is NAT don't allow INVITE request to go to UAC2 and the call
can't be done.
So, is there a way to force my SIP Server to do the INVITE request to UAC2
via SER Proxy ? by doing a different REGISTER request or INVITE request ?
Thanks,
Greger V. Teigre a écrit :
Anthony,
If the only thing you want to do, is NAT traversal, then that's been done
before. Have a look at http://onsip.org/ The Getting Started document
and config files explains how to do NAT traversal with rtpproxy and
mediaproxy.
g-)
----- Original Message ----- From: "Anthony Chapellier"
<anthony(a)mbdsys.com>
To: <serusers(a)lists.iptel.org>
Sent: Wednesday, November 09, 2005 3:38 PM
Subject: [Serusers] Rewriting SDP Infos for NAT Traversal
--
M. Anthony Chapellier
---------
MBDSYS SARL
139, avenue Paul Vaillant Couturier
93120 LA COURNEUVE
FRANCE
Tel : +33 (0) 148 35 20 46
Fax : +33 (0) 148 37 79 28
http://www.mbdsys.com
Hi,
When an INVITE request is incoming, I need to rewrite VIA Header Field,
Contact Header Field, (c=) field in SDP message core and (o=) field in
SDP message core too with IP public adress of UAC. Those are needed by
my SIP Server before SER Proxy forward the request to him.
I got some success with rewriting Contact Header File by using
fix_nated_contact() function and (c=) field with fix_nated_sdp("1")
function. But I don't succeed at all in rewriting (o=) field and
partially for VIA Header Field.
To do so, I tried to use the following function :
fix_nated_sdp("8"); No Result :(
forcerport(); It seems to add real IP public adress and
port in VIA header field but it's
not rewriting IP private adress
So, finally is it the good way to do this thing or is there something
wrong with my behaviour ?
Thanks,
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