Oreilly has a great article about using Google as a free proxy. You can access restricted web sites using Google language tools service as a proxy.You can translate a webpage, using Google translator, to access it even if restricted.

Proxy is a device that stands between a PC and the internet, providing all the conncetions to the word wide web. What a proxy does is to receive all data from a requested site, so when you access web pages all data come from proxy.

When we use net in office/colleges/universities, services are set to provide more safety blocking the access to unrestricted web sites. What you can do now is use Google translator service (language tools) as a proxy to bypass the restrictions.

You just need to type the following URL:

http://www.google.com/translate?langpair=en|en&u=www.xyz.com
(www.xyz.com stands for the URL you need to go to...)