[SR-Users] rtpproxy not forwarding rtp packets.

Abdul Basit basit.engg at gmail.com
Fri May 18 10:37:50 CEST 2018


It looks a simple question but whats outgoing RTP packets destination? Is
CALLEE IP present on that NATed destination?
Confirm that RTP Proxy determined that NATed IPs properly.
What did you receive in 200OK from CALLEE?
Check if engaged RTP ports are open in the flow?


--
regards,

abdul basit

On 18 May 2018 at 13:08, Bilal Abbasi <bilaln018 at gmail.com> wrote:

> Corrigendum:
> We are getting packets from CALLER*
>
> Regards
> Abbasi
>
> On Fri, 18 May 2018 at 12:46 PM, Bilal Abbasi <bilaln018 at gmail.com> wrote:
>
>> Actually they dont even get out of rtpproxy, we cant see that in the in
>> sngrep/tcpdump.
>> We are getting packets from callee but nothing going out of
>> rtpproxy(talking about local dump)
>>
>> Regards
>> Abbasi
>>
>> On Fri, May 18, 2018, 12:13 Giovanni Tommasini - evosip
>> <giovanni.tommasini at evosip.cloud> wrote:
>>
>>> 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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