[SR-Users] Kamailio with CGNAT

[Carsten Bock]

Hi,

it's seems not related to CGNAT, but more due to a misconfiguration on
the Proxy-CSCF. It should evaluate the "alias" in the R-URI in order
to send it to the proper address.

Thanks,
Carsten
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Am Di., 28. Aug. 2018 um 13:19 Uhr schrieb Amar Tinawi <amar.tinawi at gmail.com>:
>
> Hi Joel
>
> the Via's and Record routes is due to IMS structure, but it doesn't affect the concept as i test it with a normal sip Proxy
>
> Proxy IP : 94.252.181.93 : 5050
> RTP Engine : 94.252.181.49
> I-cscf : 10.192.129.134
> s-cscf :10.192.129.134
>
> Actually i'm using what Mr Carsten introduce for IMS
>
> On Mon, Aug 27, 2018 at 8:33 PM Joel Serrano <joel at textplus.com> wrote:
>>
>> Hi Amar,
>>
>> I had a quick look and I see a lot of via/route headers, I will look
>> properly later today, can you give me some details on what IP is what
>> in those traces for when I check them later?
>>
>> Also, are you using a kamailio config based on vanilla config
>> (specially regarding NAT handling and Contact/SDP updates/rewrites)?
>>
>>
>>
>>
>>
>> On Sun, Aug 26, 2018 at 11:39 PM, Amar Tinawi <amar.tinawi at gmail.com> wrote:
>> > it's Kamailio for signaling with RTPengine for media (also the RTP engine
>> > has public IP)
>> >
>> > any call to reach the user behind the CGNAT will fail because of the 200 OK
>> > msg not reaching the Proxy somehow (i checked, the massage is generated in
>> > the client)
>> > and any call initiated by the CGNAT client succeeded
>> >
>> > would you please check the attached
>> > many thanks
>> >
>> > On Mon, Aug 27, 2018 at 6:00 AM Joel Serrano <joel at textplus.com> wrote:
>> >>
>> >> It would definitely be useful to see sip traces of the different scenarios
>> >> to try and find what the problem is.
>> >>
>> >> Can you give some details of what your setup looks like? Is kamailio
>> >> acting as a signaling proxy only or is it also handling RTP with
>> >> rtpengine/rtpproxy?
>> >>
>> >> On Sun, Aug 26, 2018 at 13:30 Amar Tinawi <amar.tinawi at gmail.com> wrote:
>> >>>
>> >>> Thanks Joel For reply
>> >>>
>> >>> when any user (Not Nated or behind Normal NAT)  is trying to reach a
>> >>> client behind CGNAT, the INVITE delivered and the client is start to
>> >>> ringing, but when answering, the answer is not delivered to the proxy, so
>> >>> not delivered to the calling client result to the call started in the
>> >>> CGNATED client and still in establishing in the calling one.
>> >>>
>> >>> The call is established successfully when the CGNATED send the INVITE to
>> >>> Not Nated client and two way audio.
>> >>>
>> >>> CGNATED to CGNATED not working as well .
>> >>>
>> >>>
>> >>>
>> >>> On Sun, Aug 26, 2018 at 7:57 PM Joel Serrano <joel at textplus.com> wrote:
>> >>>>
>> >>>> Also, if the client is not behind CGNAT do you get the Ringing from
>> >>>> called party?
>> >>>>
>> >>>> Is called party the same in both cases?
>> >>>>
>> >>>>
>> >>>>
>> >>>> On Sun, Aug 26, 2018 at 09:54 Joel Serrano <joel at textplus.com> wrote:
>> >>>>>
>> >>>>> Can you send the INVITE that proxy sends to called party?
>> >>>>>
>> >>>>> On Sun, Aug 26, 2018 at 02:05 Amar Tinawi <amar.tinawi at gmail.com>
>> >>>>> wrote:
>> >>>>>>
>> >>>>>> Hello
>> >>>>>> Although my question it's not related to Kamailio directly, but i
>> >>>>>> think someone could help in this strange behavior
>> >>>>>>
>> >>>>>> in our tests, we have some clients under private networks, where the
>> >>>>>> provider of those networks implements CGNAT (NAT444) for it's customers to
>> >>>>>> reach internet
>> >>>>>> (Client Private IP) --->(Home router: Private to Private NAT)--->(FW
>> >>>>>> with CGNAT)---------------------------->(Kamailio Proxy Public IP)
>> >>>>>>
>> >>>>>>
>> >>>>>> Registration is performing fine, but making calls from this client had
>> >>>>>> strange problem as follow:
>> >>>>>>
>> >>>>>> Client -------------INVITE--------------> Proxy
>> >>>>>> Proxy -------------Trying---------------->Client
>> >>>>>> Proxy--------------INVITE---------> Called Party
>> >>>>>>
>> >>>>>> The called party should send Ringing msg, but the massage get lost
>> >>>>>> somewhere and didn't reach to the Proxy. Although all the IP's in sip
>> >>>>>> massages are public
>> >>>>>> i tried with STUN/TURN and NAThelper module solutions, but didn't help
>> >>>>>>
>> >>>>>> is there any way to slove CGNAT with SIP in Kamailio?
>> >>>>>>
>> >>>>>>
>> >>>>>> Thanks in Advance
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>>
>> >>>>>> _______________________________________________
>> >>>>>> 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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