Hi all, We are running Squid proxy version 3.0-stable and everybody can connect to the internet. but many clients who is trying to connect to an IIS website that requires user authentication. we have following error: HTTP Error 401.2 - Unauthorized: Access is denied due to server configuration. Internet Information Services (IIS) when we bypass squid it works fine and they are prompted to enter their login details. i read many forums and sites but i couldn't find solution about this issue. I wonder if you could help me. Thanks Salehi