[Serusers] non-symmetric rtp with rtpproxy??

Klaus Darilion klaus.mailinglists at pernau.at
Tue Jan 23 18:58:46 CET 2007


Hi Cesc!

Check out the "a" flag:

http://www.openser.org/docs/modules/1.1.x/nathelper.html#AEN319


regards
klaus



Cesc wrote:
> Hi,
> 
> I know this probably is a useless question, as rtpproxy says it is a
> symmetric proxy ... but i have to ask, for peace of mind :)
> 
> In my setup, i have on one side a symmetric rtp phone (A) ... connected 
> to a
> ser proxy + rtpproxy ... and on the other side, a non-symmetric phone (B).
> This is all on a lan, so no firewalls and stuff ... but I MUST use the
> rtpproxy and I MUST use this non-symmetric phone (more like a gateway,
> actually).
> 
> A ------ SER+rtpproxy ------ B (nonsym)
> 
> So, the funny thing happens that i end up reciving audio from B to A ... 
> and
> then I hear A's own audio after being bounced by B (funny, huh?). The
> bouncing is due to rtpproxy changing the rtp port where he sends to B 
> ... he
> starts with the one announced on SDP ... then, after the first RTP received
> from B, he switches to this new port ... mmmm
> 
> I guess this is a lost cause ... but maybe someone has a brilliant 
> idea?? :D
> (like a hack in rtpproxy which suddenly turns it into
> non-symmetrical-rtp-supported-endpoint proxy? :D )
> 
> Regards,
> 
> Cesc
> 
> 
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> 
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-- 
Klaus Darilion
nic.at




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