[Serusers] How to Minimize rtp proxy usage for all cases including when behind the same NAT

[sip]

On Wed, 07 Dec 2005 10:23:38 -0800, S G wrote
> It's pretty simple actually, to determine if your behind the same 
> NAT. You just check if the request for both parties are coming from 
> the same external public IP. Sure, this might not account for every 
> case, multiple subnets, multiple NAT setups, but it takes care of a 
> great deal of them. I would say most home users and offices have a 
> simple single NAT setup. The problem is when using STUN how to set 
> the SDP's to use the pre-STUN local ip's. Without STUN it works just 
> fine, but you of course end up rtpproxying ever call.
> 


Multiple NATs are pretty commonplace these days. To discount them as being
unimportant is really a bad idea.  MOST big home network providers give NATted
addresses to their customers... many of whom NAT their own subnets. 

N.