[OpenSIPS-Users] Functioning 1.7 + RTP Proxy Configuration

[qasimakhan at gmail.com]

I dunno what you are trying to explain but a simple scenario for topology
hiding would look something liek this:

UA       OSIPs/RTPP     *      CARRIER
<--------------<>--------------<>---------->
<########<>########<>######>

In the above scenario your OpenSIPs and RTPProxy are both running on the
same server so both your SIP signaling and RTP stream will be relayed to
OpenSIPs/RTP box. Now your OSIPs will relay these requests to your * server
and similarly RTPProxy will relay your RTP stream to the * box. Now if you
look on UA(User Agent's) side only one node will be visible to it. To
furthur secure your * box you can remove it from public domain and assign
it a local IP. Possibilities are endless :).

Lastly i am sure i explained every thing right. Please correct me if i am
wrong anywhere.

Regards,
Qasim


On Fri, Aug 31, 2012 at 6:20 PM, Nick Khamis <symack at gmail.com> wrote:

> >> RTP is used for many purposes most commonly to hide your internal
> network topology i.e. in your case your * server also it helps in NAT
> traversal.
>
> That is exactly what we are trying to accomplish. Would like all SIP
> traffic to go through the OpenSIPS server,
>
>
> Could someone kindly illustrate graphically how the flow of traffic is
> suppose to look in a topology hidden network using NAT traversal
> please? Should there be port forwarding
> of RTP traffic to the Proxy? Meaning, should the incoming ITSP traffic
> be directed at OpenSIPS:
>
>
> ----->: Initial Stream
> *****> Asterisk Stream
>
> What I think we have now, and why we don't need RTP NAT traversal yet:
>
> Scenario 1
>
> UC > Proxy > Asterisk > ITSP > * Router 192.168.2.1  * > Back to
> Asterisk > Back to Proxy > Back to UC (Final)
>
>                   Proxy------->Asterisk-------->  ITSP
> UC  ------->     *                   *  *                   *
>       <******     *****************  ****** Router***
>
>
> What we should have and need eventually (Topology Hiding using NAT
> traversal):
>
> Scenario 2
>
> UC > Proxy > Asterisk > ITSP >  *Router 192.168.2.1 * > Back to
> OpenSIPS > Back to UC (Final)
>
>
>                   Proxy------->Asterisk-------->ITSP
> UC  ------->     *                                     *
>       <******     *                                     *
>                      *****Router 192.168.2.1****
>
>
>
> i.e., there has to be no direct connection between the UCs or ITSP and
> asterisk. I think we have accomplished this without using RTP proxy
> since everything is on the same subnet,
> or am I incorrect? And as you mentioned, the RTP stream is now being
> directed at the Asterisk server? Will get a NGREP trace posted when I
> get to work. Please remember
> that this is done using virtual machines as a test bed for now...
>
>
>
> Thank you Kindly for your Help,
>
> Nick.
>
>
> On Fri, Aug 31, 2012 at 12:11 AM, qasimakhan at gmail.com
> <qasimakhan at gmail.com> wrote:
> > Most probably your RTP stream is directly bein connected to * server.
> RTP is
> > used for many purposes most commonly to hide your internal network
> topology
> > i.e. in your case your * server also it helps in NAT traversal.
> >
> > Regards,
> > Qasim
> >
> > On Fri, Aug 31, 2012 at 8:05 AM, Nick Khamis <symack at gmail.com> wrote:
> >>
> >> Thank you guys for your response. It's the strangest thing. I removed
> >> all the rtpproxy and nathelper stuff, and it works perfectly?
> >> Everything is on the same subnet, i.e.:
> >>
> >> Router
> >>     |
> >>     ------------- MySQL 192.168.2.105 (Virtual Box)
> >>     |
> >>     ------------- OpenSIPS 192.168.2.102 (Virtual Box)
> >>     |
> >>     -------------Asterisk 192.168.2.110 (Virtual Box)
> >>     |
> >>     ------------- Polycom 192.168.2.102 (Virtual Box)
> >>
> >>
> >> The flow of transmition is:
> >>
> >> UC------->Proxy------->Asterisk
> >>
> >>
> >> And I have two way audio without rtp proxy or port forwarding. I'm now
> >> scared and confused. Can someone please
> >> explain to me how this is?
> >>
> >> Thanks in Advnace,
> >>
> >> Nick.
> >>
> >> _______________________________________________
> >> Users mailing list
> >> Users at lists.opensips.org
> >> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
> >
> >
> >
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>
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