[SR-Users] Kamailio-5.3.3. NAT and RTP not working

Thu May 14 17:09:32 CEST 2020

HI,

Hold on a moment,

> 10.40.10.3 - pcscf in port 4060 (pcscf with NAT enabled in pcscf.cfg
> (!#define WITH_NAT) and configured rtpproxy)
> 10.40.10.12 - icscf in port 4070
> 10.40.10.5 - scscf in port 4080
> 10.40.10.30 - hss
>

So i assume you are using the examples provided in the ims folder of
kamailio repo right? Isn't it using RTPEngine and not RTPProxy? Or have you
modified the P-CSCF configuration to work with RTPProxy?

Best regards,
Supreeth

On Thu, 14 May 2020 at 16:39, Pavithra Mohanraja <pavimohan3004 at gmail.com>
wrote:

> Hi ,
> I have attached working rtp pcap file. But it is getting reverted back to
> me .
>
> As you said , i have tried restarting rtpproxy several times. but it didnt
> work .
>
>
>
> On Thu, May 14, 2020 at 7:11 PM supreeth herle <herlesupreeth at gmail.com>
> wrote:
>
>> Thanks for the pcap. Sorry, to ask this but can you also send pcap of
>> scenario where you see RTP packets?
>>
>> Also, did you restart the rtpproxy after altering the
>> /etc/default/rtpproxy ?
>>
>> i.e.
>>
>> $ systemctl restart rtpproxy
>>
>> Best Regards,
>> Supreeth
>>
>> On Thu, 14 May 2020 at 14:51, Pavithra Mohanraja <pavimohan3004 at gmail.com>
>> wrote:
>>
>>> Hi Supreeth,
>>> I have attached pcap files . kindly check and let me know.
>>> filter of rtp packets and check.
>>>
>>> *filter : sip || rtp*
>>>
>>>
>>> On Thu, May 14, 2020 at 5:15 PM supreeth herle <herlesupreeth at gmail.com>
>>> wrote:
>>>
>>>> Hi Pavithra,
>>>>
>>>> Thanks for the clarification. Can you please attach a pcap of the call
>>>> where you are not seeing the RTP packets? And, btw is the call getting
>>>> dropped or something in that scenario?
>>>>
>>>> Regards,
>>>> Supreeth
>>>>
>>>>
>>>> On Thu, 14 May 2020 at 13:34, Pavithra Mohanraja <
>>>> pavimohan3004 at gmail.com> wrote:
>>>>
>>>>> Hi Supreeth,
>>>>>
>>>>> I have kamailio ims installed in 4 vms inside openstack.
>>>>>
>>>>> 10.40.10.3 - pcscf in port 4060 (pcscf with NAT enabled in pcscf.cfg
>>>>> (!#define WITH_NAT) and configured rtpproxy)
>>>>> 10.40.10.12 - icscf in port 4070
>>>>> 10.40.10.5 - scscf in port 4080
>>>>> 10.40.10.30 - hss
>>>>>
>>>>> so all these vms are running in same subnet.
>>>>> I have a floating ip associated to pcscf.
>>>>> Now I have two zoiper clients outside openstack
>>>>> zoiper1 - 10.0.2.15 (NAT Enabled Network adaptor)
>>>>> zoiper2 - 10.0.2.15
>>>>>
>>>>> when i am making a call from zoiper1 to zoiper2, call is going
>>>>> properly . SIP messages are coming properly in wireshark packets.
>>>>> when i filter for RTP packets in wireshark,  it is not coming.
>>>>>
>>>>>
>>>>> when i have the zoiper clients inside openstack itself ,i can able to
>>>>> see RTP Packets in wireshark between two sip clients without any NAT
>>>>> related configurations done.
>>>>>
>>>>> Kindly help me.
>>>>> Thanks.
>>>>>
>>>>> On Thu, May 14, 2020 at 4:49 PM supreeth herle <
>>>>> herlesupreeth at gmail.com> wrote:
>>>>>
>>>>>> Can you explain some more when you mean by "RTP alone is not
>>>>>> coming."? And, how are you checking/verifying that?
>>>>>>
>>>>>> Regards,
>>>>>> Supreeth
>>>>>>
>>>>>> On Thu, 14 May 2020 at 13:12, Pavithra Mohanraja <
>>>>>> pavimohan3004 at gmail.com> wrote:
>>>>>>
>>>>>>> Hi ,
>>>>>>>
>>>>>>> Yes I have configured as you mentioned only . In my pcscf only i
>>>>>>> have rtpproxy also configured.
>>>>>>> Floating IP i have given in listen address also as
>>>>>>> listen = 10.40.10.3:4060 advertise 10.45.4.22:4060
>>>>>>>
>>>>>>> 10.40.10.3 - private ip
>>>>>>> 10.45.4.22 - floating ip
>>>>>>> Still RTP alone is not coming.
>>>>>>>
>>>>>>> Is it the only way of configuring NAT ?
>>>>>>>
>>>>>>> Thanks.
>>>>>>>
>>>>>>> On Thu, May 14, 2020 at 4:37 PM supreeth herle <
>>>>>>> herlesupreeth at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hello Pavithra,
>>>>>>>>
>>>>>>>> Have you tried advertising the floating IP of the VM running
>>>>>>>> RTPProxy as follows?
>>>>>>>>
>>>>>>>> Edit /etc/default/rtpproxy file as follows:
>>>>>>>>
>>>>>>>> # Additional options that are passed to the daemon.
>>>>>>>> EXTRA_OPTS="-l 172.24.15.30 -d DBUG:LOG_LOCAL0"
>>>>>>>>
>>>>>>>> here, "-l <PUBLIC_IP>"
>>>>>>>>
>>>>>>>> Hope it helps.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Supreeth
>>>>>>>>
>>>>>>>> On Thu, 14 May 2020 at 13:01, Pavithra Mohanraja <
>>>>>>>> pavimohan3004 at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi ,
>>>>>>>>>
>>>>>>>>> Could anybody please give me the approach how to configure NAT in
>>>>>>>>> kamailio IMS.
>>>>>>>>>
>>>>>>>>> I have installed kamailio IMS in openstack environment which has
>>>>>>>>> private ips for all four vms (each component in one vm). pcscf has one
>>>>>>>>> floating IP attached. I have enabled "WITH_NAT" and configured rtpproxy .
>>>>>>>>>
>>>>>>>>> when i make a call from outside of openstack using 2 zoiper
>>>>>>>>> clients with outbound proxy keeping floating ip of pcscf, I am getting 200
>>>>>>>>> ok with all SIP packets correctly flowing but there is no RTP Packet.
>>>>>>>>>
>>>>>>>>> When i try the same within openstack environment without using
>>>>>>>>> public ip, I am getting RTP Packets.
>>>>>>>>>
>>>>>>>>> Kindly tell me the procedure of NAT Enablement or do i need to do
>>>>>>>>> anything other than this.
>>>>>>>>>
>>>>>>>>> Kindly help because i am stuck with this for long time.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Thanks.
>>>>>>>>> _______________________________________________
>>>>>>>>> Kamailio (SER) - Users Mailing List
>>>>>>>>> sr-users at lists.kamailio.org
>>>>>>>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>>>>>>>
>>>>>>>> _______________________________________________
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>>>>>>>>
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