We've been building a secure Squid Web Proxy the past few months, and we'll continue to do so for a couple more. Last time [May 2009], we got Squid installed, running and restricted to serve only ...
Can't you add machine accounts to the autheticated users on the ISA server? Or better yet, use Domain Computers group. That would allow access for all system accounts on all computers.
Consider the venerable Web proxy—back when the Internet was new to most of us, setting up a Web proxy was a convenient way to grant users of an otherwise non-Internet-connected network access to the ...