[SR-Users] Help to build a Kamailio SBC

[PRE s.r.l.] - Alex alex at presrl.net
Fri Sep 12 14:49:53 CEST 2014

the situation is:

client -> kamailio + rtproxy -> asterisk -> rtpproxy + kamailio -> other client

the idea is that rtpproxy has to proxy the whole rtp traffic between asterisk or other media proxy and the client.

the strange problem is that my client which is receiving the call (csipsimple or other one) views the call origination as it was originated by asterisk private ip ( (the callid/contact is extension at
the correct behaviour is in my opinion that the call has to appear as it was originated by kamailio (extension at 151.xx.xx.xx)

i'm using the dispatcher module to route the call from kamailio to asterisk.

Thank you for your help
On 11 Sep 2014, at 12:46, Daniel-Constantin Mierla <miconda at gmail.com> wrote:

> Hello,
> understanding the config file is going to take some time, so it is unlikely many will have the spare time for it.
> You have to provide more specific details, like the sip trace (ngrep on kamailio server sip ports) for the issue, presenting what are the parties involved in sending and receiving, then what is wrong and what should be there.
> Then we can eventually discover what is the part of the config dealing with that and how can be fixed.
> Cheers,
> Daniel
> On 11/09/14 00:55, [PRE s.r.l.] - Alex wrote:
>> Hi to everyone,
>> I’m trying to implement a SBC for my network based on Kamailio
>> The base idea is putting Kamailio on a dual home machine (one public interface for clients and a private interface for media servers and database), using rtpproxy to handle the relaying from public to private network.
>> The only problem I got is that called client get the call as it was originated by one of the media server (the call contact is some like ext at media.server.ip), which is wrong in my opinion.
>> Here it is the configuration,
>> can you help me dealing with this?
> -- 
> Daniel-Constantin Mierla
> http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
> Next Kamailio Advanced Trainings 2014 - http://www.asipto.com
> Sep 22-25, Berlin, Germany
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PRE s.r.l.
Backbone Network Mission Control
System Engineering&Architecture Task Force
alex at presrl.net
+39 0971 471 430
+39 388 150 6886

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