[Serusers] Forwarding to another number if busy

[Andy Blen]

At 05:14 PM 6/6/2003, Greg Fausak wrote:
>I do not know why reply_route seems to call the
> main route block again.  I do know that if I comment out
> the authentication code in the main route block my forwarding
> works.  If I do not comment it out, then the forwarding
> fails with an 'Unauthorized' directed at the pstn gateway.

Presumably, you rewrite the URI with a URI which results in
a loop over loopback interface. That causes a request to be
forwarded to the server again as a new transaction, which is
subject to authentication checks again. You can verify it by looking
at via_cnt in Warning header field of replies or by watching
local interface.  There are different ways of dealing with it
-- not challenging request coming from itself, forwarding to
gateway directly (as opposed through itself), for example.

a.