BookRix

The book is about the best 4 free proxies used worldwide to bypass internet filters and unblock sites,facebook and youtube and save computer's Data.

To control internet where  employees and children: Organizations and also  parents set up proxy servers to control and monitor how their employees or kids use the internet.Actually for limiting using internet and for kids safety. Most organizations don’t want you looking at specific websites on company working time, so they  configure the proxy server to deny access to specific sites of course , instead redirecting you with a nice note asking you to refrain from looking at certain  sites using  the company network.