[OpenSIPS-Users] Force media through the Opensips server

[TeleCube - John]

Hi guys,

I just wanted to followup and post my resolution to this problem.

I tried various configurations and setups with RTPProxy to get the media 
routing properly through the 4.5.6.7 ip address with no success at all.

So, I packed RTPProxy away and installed MediaProxy.

I added one statement:
-----------------------
if (is_method("INVITE") && !has_totag()) {
    engage_media_proxy();
}
----------------------
and off it went... working perfectly.

Installing MediProxy was a little tedious, not nearly as simple as 
RTPProxy but it works.

Install instructions and details I used from: 
http://mediaproxy.ag-projects.com/

Thanks for the help everyone.

Much appreciated.
Cheers,
John


TeleCube - John wrote:
> Hi Adam,
>
> Thanks, the fog is starting to lift now...  :-)
>
> I'll make some changes and come back with results shortly.
>
> Cheers,
> John
>
> Adam Twardowski wrote:
>> John,
>>
>> The o= is the Origin IP, which doesn't really matter, the c= is the 
>> connection IP, which is the important one.  You probably want to use 
>> force_rtp_proxy() to rewrite the sdp and make it go through the 
>> rtpproxy, and in your asterisk SIP peer, you can either set the peer 
>> IP to 4.5.6.7 and have your proxy re-write the RURI to 1.2.3.4 and 
>> relay it along, or you could set outboundproxy=4.5.6.7 in sip.conf on 
>> your sip peer and just have opensips relay it.  You may also need to 
>> setup an on-reply route to capture 180/183 messages with SDP and 
>> rewrite the IP's in there too.
>>
>> --Adam
>>
>> On Fri, Aug 27, 2010 at 10:45 PM, TeleCube - John 
>> <john at telecube.com.au <mailto:john at telecube.com.au>> wrote:
>>
>>     Hi Max,
>>
>>     Thanks for your reply.
>>
>>     I have rtpproxy running and I think it's all configured ok.
>>
>>     I can use fix_nated_sdp() with flags and see the changes in the
>>     sdp lines in the packets.
>>
>>     What I am struggling with is just how to go about telling the
>>     asterisk server and the outbound route that all traffic is to run
>>     through my proxy
>>
>>     I'm not sure what the purpose of the o= and c= lines are and at
>>     which stage in the packet flow I need to re-write which lines.
>>
>>     If anyone can offer any pointers that will be awesome.
>>
>>     Kind regards,
>>     John
>>
>>
>>     Max Mühlbronner wrote:
>>>       Hello,
>>>
>>>     Yes, the opensips will rewrite the sdp like you said, so it will contain 
>>>     the ip of the rtpproxy (or mediaproxy).  It can be used to proxy the rtp 
>>>     traffic to a specific destination.
>>>
>>>     But the rtpproxy does not necessarily have to be the same machine as 
>>>     your Opensips. The rtpproxy is a different tool which will be enabled by 
>>>     setting the relevant modparam settings and also calling the rtpproxy in 
>>>     your routing-script.
>>>
>>>     http://voiprookie.blogspot.com/2009/04/rtpproxy-12x-installation.html
>>>
>>>     maybe there are also other, better tutorials but this link seems to be a 
>>>     good start for setting up rtpproxy with opensips.
>>>
>>>
>>>     BR
>>>
>>>     Max M.
>>>
>>>
>>>     Am 27.08.2010 15:36, schrieb TeleCube - John:
>>>       
>>>>     Hi,
>>>>
>>>>     I have a setup as follows:
>>>>
>>>>     1.2.3.4 - Outbound Route
>>>>     4.5.6.7 - Opensips proxy
>>>>     4.5.6.8 - Asterisk server
>>>>
>>>>     The outbound route will only allow any traffic, signaling and media, via
>>>>     the 4.5.6.7 IP address. It cannot currently accept media from a
>>>>     different ip than the signaling.
>>>>
>>>>     Currently the astx server sends media direct to the outbound route.
>>>>
>>>>     Signaling is fine but I need to force the media stream from the asterisk
>>>>     server through the opensips proxy.
>>>>
>>>>     Am I correct in expecting that nathelper/rtpproxy can do this?
>>>>
>>>>     Is it simply a matter of re-writing the sdp detail that will tell the
>>>>     asterisk server to route media through the opensips ip address?
>>>>
>>>>     Any examples will be greatly appreciated.
>>>>
>>>>     Thanks,
>>>>     John
>>>>
>>>>     _______________________________________________
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>>>>     Users at lists.opensips.org <mailto:Users at lists.opensips.org>
>>>>     http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>>
>>>>         
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>>>       
>>
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