Hello, I am implementing ISA server as a caching only proxy server in an tertiary education college. The ISA server is basically a secondary cache server. All upstream requests are routed to a specified upstream server- After searching the local cache, of course. (the upstream machine is a central machine and not administered by the college). Now, my problem is that things such as Internet banking (uses SSL) are unreliable.. Often SSL pages will time out (For instance after login to the site) BUT at other times everything will be smooth. I have isolated the problem to my local ISA server by pointing a browser directly at the upstream machine. (Net banking etc is fine in this situation) I appreciate that I could set up a destination set for those sites , and create a rule in routiong for that destination set, specifying never to cache content. But It shouldnt be caching SSL anyway, and the problem is intermittent. Any ideas?? Thanks, Nick