Hi, 

   Please see inline.
_________________________________________________________________
Peili Xu
System Engineer Core Network Research & Standard Department
Huawei Technologies Co., Ltd
Email:   [EMAIL PROTECTED]
Phone:  +86-755-28780808
Website: www.huawei.com
_________________________________________________________________

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Dale Worley
Sent: Wednesday, July 13, 2005 1:30 AM
To: [email protected]
Subject: RE: [Sip-implementors] proxy servers multiple realm

> From: Asif Saleem
>
> When a client sends a request to a proxy server for the first time,
> how does the proxy server determine the realm of that request? My
> hunch is that it is based on the Request-URI.

Usually, the proxy does not attempt to do that.  Instead, in the 407
response, it supplies a Proxy-Authenticate header for every realm it would
be willing to accept.  The UA then resubmits the request with a
Proxy-Authorization header for one or more of those realms.

<xupeili>
Since the final choice of the realm is decided by user. Another possible way
is that user can config the associated realm in his terminal. 
So that the initial Request can contain the realm information.
</xupeili>

Dale

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