Using unblockers might violate your school or office's Acceptable Use Policy.

At its core, Holy Unblocker LTS is a that acts as an intermediary. When you make a request to a blocked website, your request is first sent to the Holy Unblocker server. This server then fetches the data from the target site and relays it back to you. To the network filter, it appears as if you are only communicating with the proxy server, not the blocked site itself.

The version is key. Many proxies get abandoned after a few months. LTS means regular security updates, bug fixes, and compatibility patches. It’s maintained to survive network filtering changes.