[SR-Users] Kamailio RTP Proxy Questions

Carsten Bock carsten at ng-voice.com
Fri Oct 7 15:21:47 CEST 2011 

Hi Austin,

you could simply add dlg_manage() for INVITE's directly after your
"route(REQINIT)" request + a similar check in the "onreply_route".
If you use rtpproxy_destroy() it will only destroy the current
RTP-Session, not all of them.

Kind regards,
Carsten

2011/10/7 Austin Einter <austin.einter at gmail.com>:
> Carsten
> Really appreciate your input.
>
> I am completely new to this. Please bear with me with easy questions.
>
> When you say I can use rtpproxy_manage() in the request and response and use
> rtpproxy_destroy() in BYE, I want to know where I have to modify. Is it
> kamailio.cfg file where I need to modify. If it is the case, do I need to
> modify the route block as below..., kindly guide me here with steps...
>
>
> # Main SIP request routing logic
>
> # - processing of any incoming SIP request starts with this route
>
> route {
>
> # per request initial checks
>
> route(REQINIT);
>
> # NAT detection
>
> route(NAT); .......................
>
> Also, we are just telling rtpproxy_destroy in BYE case, will it not affect
> other calls. At any given point of time, there might be more than 1 calls,
> doing rtpproxy_destroy will stop rtp session for disconnecting call or can
> it affect the existing active calls.
>
>
>
> Thanks
>
> Austin.
>
>
>
> On Fri, Oct 7, 2011 at 5:39 PM, Carsten Bock <carsten at ng-voice.com> wrote:
>>
>> Hi,
>> you can simply use Kamailio and RTPProxy here.
>> You simply can use rtpproxy_manage() in the request and in the reply;
>> rtpproxy_destroy() in the Bye-Message. You must also use
>> record_route() in order to have all subsequent requests going through
>> your proxy. That should do your job.
>>
>> May you want also to look at SEMS (iptel.org/sems) as an SBC. SEMS can
>> do that as well, but additionally also teardown in case of
>> RTP-Timeout, Codec Enforcement (e.g. only allow G711) and of course
>> topology hiding.
>>
>> Kind regards,
>> Carsten
>>
>> 2011/10/7 Austin Einter <austin.einter at gmail.com>
>> >
>> > Dear Carsten
>> > Thanks for reply.
>> >
>> > I did not install rtp proxy .  I just installed kamailio after that I
>> > was able to run both kamailio and rtp proxy.
>> > I am surprised, I thought after installing kamailio 3.1.5, I will be
>> > able to execute both kamailio and rtpproxy.
>> > Not sure it it was installed in my lab pc by somebody else previously.
>> >
>> > First of all I would like to check if the scenario I am talking of is a
>> > right case to use Kamalio or not.
>> >
>> > 1. I will be running the sip softphones in private/public network.
>> >
>> > 2. I want to run kamailio proxy in public network (as an intermediate
>> > proxy).
>> >
>> > 3. I will hav a main proxy in public detwork.
>> >
>> > What I want is all my signalling and RTP packets should pass through
>> > intermediate proxy (that is Kamailio only).
>> >
>> > For this purpose do you suggest Kamailio or someother proxy/b2bua.
>> > I am able to force SIP packets through kamailio proxy (by use of route
>> > stuff in softphone).
>> >
>> > My main concern is when INVITE message pass through Kamailio,
>> > will Kamailio proxy change the IP address of phone present in SDP to self
>> > address so that media packets from called party side will come to kamailio
>> > proxy.
>> >
>> > Same concern otherway. Like when 200 OK to INVITE passes through
>> > kamailio, will kamailio change IPaddress in SDP to self IP, so that media
>> > packets from calling side will reach kamailio.
>> >
>> > Kindly help me to choose right proxy or should I look for b2bua.
>> >
>> > Thanks
>> > Austin
>> >
>> >
>> >
>> > On Fri, Oct 7, 2011 at 3:05 PM, Carsten Bock <carsten at ng-voice.com>
>> > wrote:
>> >>
>> >> Hi,
>> >> did you also install the RTPProxy itself? It is an addon to Kamailio
>> >> and not a part of Kamailio.
>> >> You find the RTPProxy here: www.rtpproxy.org
>> >> Carsten
>> >>
>> >> 2011/10/7 Austin Einter <austin.einter at gmail.com>
>> >>>
>> >>> Hi
>> >>> I downloaded 3.1.5 Kamalio source, did make and install. Tried to run,
>> >>> and tested few basic scenarios, everything working fine.
>> >>>
>> >>> I have a main proxy, want to use kamailio as intermediate proxy and my
>> >>> requirement is all RTP packets should pass through machine in which Kamalio
>> >>> proxy is running. I beleive RTP Proxy I can run in same machine where
>> >>> Kamailio proxy is running with proper configuration .
>> >>>
>> >>> For this I am referring,
>> >>> http://nil.uniza.sk/sip/nat-fw/configuring-nat-traversal-using-kamailio-31-and-rtpproxy-server page.
>> >>>
>> >>> In one of the steps it says "So, if we are using the Rtpproxy server
>> >>> with default configuration, we have to open /etc/default/rtpproxy file and
>> >>> uncomment following line regarding of udp socket, that will be sued for
>> >>> interconnection:".
>> >>>
>> >>> I tried to search rtpproxy configuration file, could not locate.
>> >>> While making and installing Kamalio proxy, the commands I used "make
>> >>> prefix=/usr/local/ all  and make prefix=/usr/local/ install".
>> >>> Can somebody point me why rtpproxy config file is missing.
>> >>>
>> >>> Also the link I am refering to is correct or wrong one.
>> >>>
>> >>> Best Regards,
>> >>> Austin
>> >>> _______________________________________________
>> >>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>> >>> list
>> >>> sr-users at lists.sip-router.org
>> >>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >> Carsten Bock
>> >> CEO (Geschäftsführer)
>> >> ng-voice GmbH i. Gr.
>> >> Schomburgstr. 80
>> >> D-22767 Hamburg / Germany
>> >> http://www.ng-voice.com
>> >> mailto:carsten at ng-voice.com
>> >> Mobile +49 179 2021244
>> >> Office +49 40 34927219
>> >> Fax +49 40 34927220
>> >> Hier finden Sie unsere handelsrechtlichen Pflichtangaben:
>> >> http://www.ng-voice.com/imprint/
>> >>
>> >> _______________________________________________
>> >> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> >> sr-users at lists.sip-router.org
>> >> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>> >>
>> >
>> >
>> > _______________________________________________
>> > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> > sr-users at lists.sip-router.org
>> > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>> >
>>
>>
>>
>> --
>> Carsten Bock
>> CEO (Geschäftsführer)
>> ng-voice GmbH i. Gr.
>> Schomburgstr. 80
>> D-22767 Hamburg / Germany
>> http://www.ng-voice.com
>> mailto:carsten at ng-voice.com
>> Mobile +49 179 2021244
>> Office +49 40 34927219
>> Fax +49 40 34927220
>> Hier finden Sie unsere handelsrechtlichen Pflichtangaben:
>> http://www.ng-voice.com/imprint/
>>
>> _______________________________________________
>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>> sr-users at lists.sip-router.org
>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>



-- 
Carsten Bock
CEO (Geschäftsführer)

ng-voice GmbH i. Gr.
Schomburgstr. 80
D-22767 Hamburg / Germany

http://www.ng-voice.com
mailto:carsten at ng-voice.com

Mobile +49 179 2021244
Office +49 40 34927219
Fax +49 40 34927220

Hier finden Sie unsere handelsrechtlichen Pflichtangaben:
http://www.ng-voice.com/imprint/

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