[users@httpd] reverse proxy with 2 level basic authentication

[Rob Baxter <rbaxter@xxxxxxxxxxx>]

I have inherited a probject where I am trying to configure Apache2 to be 
a reverse proxy to an Exchange Server with Outlook Web Access/Outlook 
Mobile Access. The security requirements dictate that there be 2 layers 
of authentication. First the use must authenticate to the proxy and then 
to the Exchange server. The proxy is using basic authentication and for 
normal web browsers this setup is working fine as the OWA is using 
Windows Forms Authentication.

The problem is that aparently the PDAs this organization is using don't 
have a browser that plays nice with Windows Forms so I was asked to 
configure the proxy to support another layer of basic authentication. 
However, I don't see how this is going to work. What I am seeing now is 
that the proxy is passing the crendentials for the first layer (itself) 
to the Excahnge server even though the browser does correctly prompt  
you for two different sets of credentials. I'd really appreciate it if 
someone could tell me if what I am trying to do is even possible of if I 
am wasting my time. Thanks in advance.

</rob>

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