Greetings all. So we have transparency working for squid, but is there a way to block the user from simply using a different proxy under preferences/etc... in the browser settings. For example, if a user suspected that we were using a transparent proxy to limit their access, they can have a different proxy setup on a remote site and enter that address as the proxy address in their browser. I know schools use squid, but how do they or anyone prevent this from happening? Thank you.
