點解決 "The URL has been blocked"

you can go to pzeg.com, then paste www.facebook.com on the pzeg.com's blank, not cover pzeg.com

You should visit the facebook at office, am I right? You company have blocked the facebook website, in fact, you can bypass it using any personal or public poxy server. BUT your company can identify who use it to by pass the network setup.

Therefore, I don't suggest you to do so.