[SR-Users] rtpproxy not forwarding rtp packets.

Giovanni Tommasini - evosip giovanni.tommasini at evosip.cloud
Fri May 18 09:11:36 CEST 2018


Hi Younas,

when you have a call if you make a trace in your sip server with sngrep or
tshark can you see the RTP packet ?
you says "I have kamailio server behind nat with rptproxy.", so is it
possible that the router in front your SIP server blocks the traffic? could
you have a trace there?
I mean the packets exit the rtpproxy but don't arrive to callee or just
don't come out of the rtpproxy?

Giovanni Tommasini |
*‚Äč‚Äčevosip* <http://evosip.cloud>


2018-05-18 1:36 GMT+02:00 Aqs Younas <aqsyounas at gmail.com>:

> Thanks for replying. Callee is actually a sip provider. I see no firewall
> or iptables rules on server to prevent rtp following towards callee.
>
> Is there anything i can do to see which thing is blocking rtps.
>
> Best
>
> On Fri, 18 May 2018 at 3:59 AM, Mack Hendricks <ap at goflyball.com> wrote:
>
>> Is there something blocking RTP traffic from reaching the callee?  Is the
>> callee a carrier or the actually endpoint endpoint (aka SIP Phone)?
>>
>> *Mack Hendricks / Head of Support / dOpenSource*
>> web: http://dopensource.com
>> support: +888-907-2085
>> dSIPRouter <http://dsiprouter.org> - GUI focused on implementing
>> Kamailio to provide SIP Trunking and PBX Hosting Services
>>
>> On May 18, 2018, at 12:50 AM, Aqs Younas <aqsyounas at gmail.com> wrote:
>>
>> Greetings list,
>>
>>
>> I have kamailio server behind nat with rptproxy. But i am getting no
>> voice on the call. After taking trace i could see that rtpproxy was getting
>> rtp packets but not packets was being forwarded towards callee side.
>>
>> Though i see in rtpproxy logs, packets being relayed from caller side.
>>
>> Does rtpproxy wait to receive a single rtp frame from callee before
>> fowarding that to callee?
>>
>> Since, i am getting no rtp from callee. So, might be rptrpoxy is waiting
>> to learn source address of callee side rtp, that is why it is not
>> forwarding rtp packets from caller towards callee.
>>
>>
>> Any pointer/suggestion is much appreciated.
>>
>> Best Regards,
>>
>> Aqs Younas
>>
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