[Users] multiple domain best practices?

[Bogdan-Andrei Iancu]

Hi Mark,

if you have a different proxy name (as server name) than the domain 
name, you need to use the outbound proxy (OBP) feature on the client:
    - set as domain the SIP domain you want (like bif.net or baz.net)
    - set OBP the address of the server (like sip.foo.net).

By this, the requests will have in FROM/RURI the SIP domain, but they 
will be sent to the OBP server.

regards,
bogdan


Mark Kent wrote:

> I'm unclear on how multiple domains should be handled in sip/openser,
> etc.  The scope of my confusion may be broader than just with openser,
> and this is more of a "concept" problem, but I'm hoping someone here
> can point me in the right direction.
>
> I've read the "domain" module documentation at openser.org.
> I'm using a Linksys SPA942 IP phone for this experiment with
> my openser 1.0.1 server.
>
> The SPA942 appears to do the following:
>
> a) sends "sip:$PROXY" for the REGISTER request-uri.
>    Here $PROXY is the actual entry typed in by the user,
>    as opposed to something looked up by using DNS SRV.
>
> b) appends "@$PROXY" to the "User ID:" entry in the "From:" field
>    and appends @IP:PORT for "Contact:"
>
> That is, as the person who configures the phone, I can view the
> proxy setting as declaring the domain of the user.
>
> But it seems more natural to me to put the actual host name of the
> proxy in that setting.  That is, if I run a service on sip.foo.net and
> have customers in domains bif.net and baz.net then each of them
> listing sip.foo.net as their sip proxy is reasonable.
>
> But, if I go that route, then it seems the only way for the user to
> send the sip server their domain is as part of the userID:
> john at baz.net and if they do that then I get "From:" fields like
> john at baz.net@sip.foo.net, and similar "Contact:" settings.
>
> Now, I can strip off the trailing domain but the clumsiness of that
> uri (sip:john at baz.net@sip.foo.net) gives me the feeling that this is
> the wrong approach.  Looking at the "Contact:" pretty much convinces
> me of this: sip:john at baz.net@192.168.168.214:5060
>
> But that takes me back to using the Proxy field as dual-duty:
> specifying the proxy and also the user's domain.
>
> I just looked at a cisco 7905 and it too does not appear to have
> a way to set the user domain.
>
> I can see how I could use unique AuthIDs to look up domains at
> registration time,  but that seems misguided too.
>
> What am I missing?
>
> Thanks,
> -mark
>
>
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