[OpenSIPS-Users] Use b2b modules to create ALG?

[Brett Nemeroff]

Jeff,
I was just thinking of the same thing the other day. I'd love to see this
kind of configuration cook-booked. :D I think the community can probably
chip in and make some sort of ultimate ALG based on OpenSIPs.

I'd be willing to help out for it.. Not sure if we have everything we need
in opensips for it.




On Wed, Mar 9, 2011 at 4:37 PM, Jeff Pyle <jpyle at fidelityvoice.com> wrote:

> One of my ultimate goals with Opensips has been to be able to configure it
> to be a LAN-to-WAN ALG, handling the signaling and media transparently on
> behalf of the LAN-side clients and the WAN-side softswitch.
>
> The ALG needs to look like, for all intents and purposes, the softswitch
> to the LAN clients.  And it needs to look like a client to the WAN-side
> softswitch.  This means clients will register to the LAN side IP address
> of Opensips.  Opensips should relay the request through to the softswitch
> after updating some header information, including the Contact field to
> include its own WAN IP address.  This way the softswitch will send
> requests for the clients back to Opensips, that will then relay them (or
> otherwise route them) to the clients.  Opensips would also need to save at
> least the LAN-side IP and the username of a registration if the softswitch
> replied with a 200 OK.
>
> There's a lot in here that isn't compatible with a proxy model.  I'm
> wondering if this is suited for a custom B2B scenario.  Basically, it's a
> top-hiding model with some extra routing capabilities based on the
> REGISTERs it passes, and the data it saves upon a successful registration.
>
> rtpproxy would handle the media.  Hopefully no sweat there.
>
> Am I on to something, or should I keep dreaming?
>
>
>
> - Jeff
>
>
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