Ongoing problem ISA2004/Win2003, some webpages are not loading. Webmail inboxes, shopping carts, Dell's website. I have tried everything I know to do. I have tried changing mtus, reinstalling, and every article I can find. All clients are firewall clients. I have tried it with web proxy clients and secure-nat clients. No difference. I have only two access policies. One allow all internal to external all users. The other is deny all external to internal all users. In that order. This is a test network . I have ISA2000/Win2k running on production network with same internet connection and it works fine. This is the error code I get on a ISA page: Technical Information (for support personnel) * Error Code 64: Host not available * Background: The gateway or proxy server lost connection to the Web server. * Date: 12/7/2004 7:28:10 PM * Server: sisd-isa.slocum.isd * Source: Remote server Jim suggested I run netmon. Ok, I did and nothing pops out to me as wrong. Would someone be willing to look at my netmon results and tell me what is happening. If so contact me off list and I will send them to you.