I manage an office of 10 people and their web browsing is getting out of hand. I would like to install a free web proxy (vmware linux image, or a physical machine) that will block ALL websites unless they are on the "Approved" list defined in the proxy settings. Can you please point me to a sourceforge project, or a low-cost solution that can do this for me?
I cannot install anything on the user's machine. It must be installed on its own machine.