Do some searching on google if you dont like this idea there may be a way to crack it or something. I would try using a proxy server. There is a site I cannot find but you would install it on your home computer and it would give you a website. You would use that website at work as a proxy server to get around the protection. If this is anything like BESS then you are pretty much screwed I guess... Otherwise I dont know.
if you change the proxy server in your browser that will work for some filters. When i was in high school they had websence and all i had to do was go to www.google.com then traslation tools then translate the webpage iwanted from any language to english and it would let me view it.