Free Proxy Server Software

[lbduballstrs]

Does anyone know of any free proxy server software to use on a Windows Server?? I tried Linux with Squid but I couldn't get it to work correctly with SquidGuard and Sarg so I kind of want to try something else. Like I said before, preferably for Windows Servers

 

[Trifid]

Windows XP Pro has in built option to be a proxy server.

 

[lbduballstrs]

Thanks, but I need something a little more advanced than ICS. Like with Squid I was able to set up rules, block websites, accelerate web browsing ect..