[Users] Server and 1 client behind NAT

[lambros21 at netscape.net]

Apologies if you get this twice - i sent it yesterday and it seems that it did not come to the list. 
 
I am trying to find out whether the following scenario is feasible:
 
Openser server behind NAT with 5060 forwarded to the box
Client 1 behind NAT (different network than the server) - could have ports statically forwarded to it if need be
Client 2 on public IP (good news here).
 
I want Client 1 to be able to register with the server to start with.
Also, Client 1 has to be able to call Client 2 (the reverse is not really required but
it is probably easier to facilitate) with RTP data flowing directly between he two.
 
It seems a difficult scenario.
I know that it may be possible to use intermediaries (e.g. mediaproxy) but
i do not want RTP traffic to go through the server.
 
Any ideas or pointers to functions / config files.
 
Regards,
Lambros
 
 
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