Hello Andreas,

Yes, that's what I had thought, but 

I am actually seeing it using two different UDP ports towards Freeswitch (send=40036 and recv=40042) 

and two more ports towards SIP Client (send=40038, and recv=40040).

I am wondering if there is any setting (or flag at compilation time) that will make it symmetric.

This rtpengine is daemon only, (not using kernel module).

Thank you,
- Deep N




On Mon, Aug 11, 2014 at 4:43 PM, Andreas Granig <agranig@sipwise.com> wrote:
Hi,

On 08/11/2014 08:34 PM, Narsay, Deep wrote:
> Is there any way rtpengine can be configured to use same UDP port to
> receive and transmit RTP  packets?
>
> The set up I'm trying is
>
> SIP_Client -->  Kamailio/rtpengine  -->  Freeswitch
> Internet            Internet         LAN          LAN 192.168.1.10
>
> I tried /rtpengine_offer / in  kamailio.cfg,
> but rtpengine seems to always use different ports to Tx/Rx the packets.
> (Causing Freeswitch to auto adjust its ports, which mutes the audio
>  channel one way).

Well, rtpengine actually uses the same port to send and receive traffic
towards a UA. However, it uses two different ports for the two parties,
which shouldn't be an issue, because Freeswitch will only see the one
port towards itself.

Andreas

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