Hi, I am running Squid proxy server with Windows AD authentication using NTLM. When I setup Squid for integrated authentication mode I am not able to go out on the internet using IE on Windows 2003, all though I am able to go out using IE on Windows 2000/XP. The error I am getting is authentication failure. If I turn integrated authentication off, my browser on Windows 2003 prompts me for a password and I am able to go online. Can someone please help me fix this problem? Thank You, Venu