We are using our fantastic Balance One core in our School and we’re very satisfied about it’s capabilities.
We are using the Firewall content blocking system, however I am aware of hundreds proxies out there that allow easily to bypass blocking system. Check out this 300 proxies list! https://www.trickseek.org/free-proxy-sites-list-top-proxy-servers-for-school/
I wonder if is there a way to efficiently block those without being required to enter them one by one. I am afraid that this may also significantly affect performance.