[Users] sip contact relay/forward/rewrite?

[Daniel-Constantin Mierla]

Hello,

On 06/17/06 00:52, Paul Smith wrote:
> Hi,
> I am new to openser and trying to use it as a proxy i.e. I have a
> phone behind NAT, and another SIP server with all our
> account/registrar/routing details, I want to try mediaproxy as a far-end
> nat traversal solution to allow us to install phones without doing much
> (or anything) to the NAT firewalls....  The idea is that I set up phones
> to use Openser as Outbound proxy, and use symmetric RTP, and tell
> openser to nathelper to do regular keep alive pings.  Then the phone
> should open SIP port to openser when registering, and OpenSER forwards
> the registration to the current sip server.  Later invites from the
> current server should go back through Openser to the phone over the
> still open ip:port pair.  MediaProxy on the openser should handle the
> RTP traffic between phone and old sip server.
>
> I have got ser and mediaproxy running and outgoing calls are fine.  The
> problem is that incoming calls are not going through the proxy... the
> phone registers via the openser proxy, but when initiating an incoming
> call to the phone the registrar server sends the SIP invite straight to
> the NAT firewall, which rejects it...
>
> What do I need to do so that openSER tells the registrar to route SIP
> INVITES back through the openser server?
>
> I realise that at present I am looking at a very insecure open relay -
> I'll add more auth and domain checking when I get the basic outbound
> relay / media proxy bit working.
>
> PHONE ---- NAT ---- SER ----- SIP registrar Server with user details etc.
>   

if your sip registrar server supports PATH extension then try to enable 
it. OpenSER CVS head has this extension (see the PATH module), you can 
give it a try.

Cheers,
Daniel

> Thanks.
>
>
>
> _______________________________________________
> Users mailing list
> Users at openser.org
> http://openser.org/cgi-bin/mailman/listinfo/users
>
>