Hi all, I am enjoying my upgrade from Proxy Server to ISA. I'm hoping someone can help me with this one problem. I would like to "ask for authentication" on outgoing requests, but it causes us to be unable to log in to a couple or three (so far) web sites that we didn't have trouble with before. One of them is UPS... Also, there is one site that we couldn't access at all. I believe that the correct filters and rules are in place. Any ideas what I may be overlooking? When I uncheck the authentication option, they all open up except for one. Could it be using a different port? In the logs it looks like port 80. Any help will be much appreciated. Tom Webb