[Users] NAT traversal with mediaproxy on natted private address

Klaus Darilion klaus.mailinglists at pernau.at
Wed Aug 23 17:17:05 CEST 2006


Simon Morvan wrote:
>                                +----------+
> +-----+            +------+     |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 ?

AFAIK rtpproxy supports this. Thus, at worst case change to rtpproxy.

regards
klaus

> 
> -- 
> Simon Morvan.
> 
> 
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