[Serusers] Totally lost! proxies, firewalls, gateways, etc, etc, etc ...

[Klaus Darilion]

Yes, you are right! That, and the additional introduced delay, are
drawbacks!

Klaus

> -----Original Message-----
> From: Pablo Murillo [mailto:pm at rednet.com.ar] 
> Sent: Friday, December 12, 2003 4:06 PM
> To: serusers at lists.iptel.org
> Subject: Re: [Serusers] Totally lost! proxies, firewalls, 
> gateways, etc, etc,etc ...
> 
> 
> Thanks Klaus, but ...
> 
> If, I use RTP proxy all the traffic would go through my server or am I
> mistaken?
> 
> ----- Original Message ----- 
> If you want 2 NATed devices to talk to each other, you MUST 
> use an RTP proxy
> (except you want to manually configure the NAT router of 
> every participant).
> 
> Sessions between one public and one NATed client might work 
> depending on the
> used SIP applications. Therefore, using an RTP proxy as soon 
> at least one
> client is behind NAT is suggested!
> 
> It's very simple, take a look at the config script at:
> http://cvs.berlios.de/cgi-bin/viewcvs.cgi/ser/sip_router/etc/n
athelper.cfg?rev=1.1&content-type=text/vnd.viewcvs-markup

This will show you how to test if user agents are behind a NAT, how to
rewrite the SIP messages and how to integrate the RTP proxy.

Note: NAT traversal using RTP proxies and the nathelper module works
only if
the SIP client is symmetric (=sending and receiving on the same port,
SIP
and RTP).
--------------------------------

Pablo Murillo