100 Linux Tutorials: How to Use the Web Proxy Application from ClearOS 
This video is about one of the popular applications of ClearOS that is Web Proxy App. Using this app we can block and allow the internet of other system. For this we have to configure gateway (watch the previous video). This app has two modes: Transparent and Non-Transparent. This is a free app from ClearOS. Watch the video to get more information about Web Proxy Application.