I have ISA 2004 running on SBS 2003. Seemingly out of nowhere, any website I try to load on any of the clients or the server itself - I get "Error Code: 502 Proxy Error. The requested socket is not connected. (10057)". It is a standard ISA error page in internet explorer. I have tried everything I could think of, including uninstalling and reinstalling ISA twice. Pages loaded fine the entire time ISA was not installed. Sometimes it will start working for a couple minutes, or as much as 15-20 minutes, but it always comes back to the error. If I reboot the server it will usually work for a couple minutes before I start getting the error again.
Does anyone know what this error means? I can find NOTHING on the internet about it. Any suggestions on something else I can try?