CGI (Common Gateway Interface) proxy is a web proxy, which accepts target URLs using a Web form in your online browser window. It processes each request and returns results to your web browser. Therefore people use it on devices/networks that don't allow .true. proxy setting being changed. Just like other proxy servers, CGI proxy enables you to hide/unhide your real IP address depending on how it's been set up. It supports scripting languages such as Perl, Python and so on.