DOUBLE HOP Issue - Web Services...

[Bryan]

I have an ASP.NET web application that makes a web service call (passing
DefaultCredentials) to SQL Server Reporting Services. The SQL Server 2005
Reporting Web Service is setup with Integrated Authentication (no anonymous
access). The ASP.NET application works fine on internal servers, been when
faced with a proxy server in the middle, the credentials are being lost due
to a double hop issue. Does anyone know a way to programmatically persist
the credentials past the proxy server and on to the Reporting Services web
service?

So far, I found a blog that has all the options that I've seen so far.
Unfortunately, none of the options are optimal. But, I may not have any
other choice...
http://blogs.msdn.com/nunos/

Thanks in advance for any help!