All initial requests are anonymous. This is a given. Other than the initial anonymous requests, what do you find in the ISA logs for your tests? From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Neil Cassidy Sent: Wednesday, December 09, 2009 10:37 AM To: isalist@xxxxxxxxxxxxx Subject: [isalist] Web Proxy Auth Why do only select websites seem to fail web proxy authorization? And just started happening. I will admit I had a port # snafu using 8080 for something else until I remembered ISA was using it and changed it. Rebooted server but still cannot get to simple sites like Yahoo.com from a client (but can from the server). Can get to most sites from the client, just not select ones, and in the logs they seem to all be using 8080 and anonymous access. Any ideas? Still on ISA2004.