[SR-Users] Kamailio forward REGISTER return "general error"

[Cockhootec Yahrabee]

The problem was in invalid nonce value as you can see from the debug message

 0(3411) DEBUG: auth [api.c:136]: auth_check_hdr_md5(): auth:pre_auth:
Invalid nonce value received (ret 2)


I was debugging for a while and I was also analyzing pcap dump when I
realized that kamailioB was forwarding and both replying for the REGISTER
message eg. UA answered first for 401 Unauthorized from kamailioB with it's
nonce which was of course on both kamailio's invalid (kamailioB does not
have UA registered and kamailioA was expecting different nonce). This was
happening over and over and it was unable to sync the nonce's so I was
getting 401 Unauthorized over and over.


After that i just simply add exit() after the forward(), kamailioB stopped
responsing for the REGISTER and everything started to work.


I hope that this response will help in the future someone who forget to
exit after forwarding the request :-)

Thanks anyway


On Mon, Mar 7, 2016 at 7:50 AM, Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Hello,
>
> run kamailio with debug=3 in kamailio.cfg, you should see more details
> about what happens during authorization time.
>
> Cheers,
> Daniel
>
>
> On 06/03/16 19:35, Cockhootec Yahrabee wrote:
>
> Hi everyone,
>
> I am trying to forward registration from one kamailio instance to another
> one eg.
>
> UA1 <---> kamailioB <------> kamailioA
>
>
> I am trying to register on `kamailioA` with UA1. I have UA1 registered on
> kamailioA. I am routing SIP messages by adding this to `request_route`
> block:
>
>         if (uri != myself)
>         {
>                 forward(otherKamailioIP, 5060);
>         }
>
> Where I am using as `otherKamilioIP on kamailioA the kamailioB IP address
> and vice versa.
>
> I can clearly see in Wireshark, that the SIP messages are routed correctly
> but I am getting 401 Unauthorized which is sent from kamailioA to kamailioB
> and then from kamailioB to UA1.
>
>
> I printed value of `auth_check` following this
> <http://lists.sip-router.org/pipermail/sr-users/2014-November/085851.html>
> http://lists.sip-router.org/pipermail/sr-users/2014-November/085851.html
> and I am getting return code of `-1` which is according to the
> documentation
> http://kamailio.org/docs/modules/4.2.x/modules/auth_db.html#auth_db.f.www_authenticate
> the GENERIC ERROR.
>
> I don't know what to do next. Does anyone encounter this kind of error
> before?
>
>
> Thanks in advance
>
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing listsr-users at lists.sip-router.orghttp://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
> --
> Daniel-Constantin Mierlahttp://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Kamailio Advanced Training, Berlin, March 7-9, 2016 - http://www.asipto.com
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
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>
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