[SR-Users] Kamailio with CGNAT

[Joel Serrano]

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
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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