[Users] NAT traversal with mediaproxy on natted private address

[Simon Morvan]

                               +----------+
+-----+           +------+     |OpenSER   |   +------+
|Phone|           |Router|     |MediaProxy|   |Router|
+-----+           +------+     +----------+   +------+
   |               |    |           |          |    |
---------------------  --------------------------  -------------- Internet
     Private LAN A            Private LAN B



Here is the situation : SIP phones are in a private LAN A. They can speak
with the server
hosting openser and mediaproxy which is located on private LAN B. This
server can speak
with the internet through a router that nat (1:1) its private IP on a public
one.

To be able to interconnect inside sip phone with outside ones, openser must
advertise the
private address of the mediaproxy to the inside sip phones and its public
(nated) address
to the outside sip phones. But afaik , the media proxy module doesn't let me
dynamically
choose the IP which replace the phone IP in the SDP.

How do you think I can get through this ?

-- 
Simon Morvan.
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