Imagine the following scenerio, A and B are phones behind NAT.
A---------------------NAT-------------------------RTPproxy-----------------------NAT-------------------------------B
RTP----------------> ------------------->
------------------> BLOCKED
If A sends RTP packets and RTPproxy forwards them before waiting for B's RTPs
to come, B's NAT device will block that RTP port, then they would not be able
talk at all.
Also I want to have a control on IPs of A and B for security reasons. Another
person( C ) should not be able send packets to the port reserved for B. If C
can be able to send packets to this reserved port then he will be able to hear
A's voice. Am I right?
Thanks,
Arman Gungor
> Date: Tue, 12 Jan 2010 01:57:28 -0800
> From: sobo...@sippysoft.com
> To: users@rtpproxy.org
> Subject: Re: [RTPproxy Users] notification on both sides start sending their
> RTPs?
>
> Arman Gungor wrote:
> > Hello,
> >
> > I have two questions about RTPproxy.
> >
> > Firstly, I want to use Send <javascript:;> RTPproxy for communicating 2
> > phones behind NAT. In order to realize this RTPproxy should wait for
> > both sides to send their RTPs to RTPproxy. But it starts forwarding
> > these RTPs to the other side immediately after receiving from any side.
> > Is there any way to do this without giving a fake IP address in Update
> > message? ( I want to have a control on IPs by forcing )
>
> I am not sure why this scenario is a problem. The proxy will update with
> correct IP address once it gets the first packet from the other party.
> Can you please elaborate?
>
> > Secondly, I want to know whether these phones start communicating or
> > not. Is it possible for RTPproxy to send notification when peers start
> > talking successfully (RTPs are being forwarded from both sides) ?
>
> There is no such functionality currently, but it should not be difficult
> to implement something along the lines.
>
> Regards,
> --
> Maksym Sobolyev
> Sippy Software, Inc.
> Internet Telephony (VoIP) Experts
> T/F: +1-646-651-1110
> Web: http://www.sippysoft.com
> MSN: sa...@sippysoft.com
> Skype: SippySoft
>
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