This CGI script acts as an HTTP or FTP proxy. Through it, you can retrieve any resource that is accessible from the server it runs on. This is useful when your own access is limited, but you can reach a server that in turn can reach others that you can’t. In addition, the user is kept as anonymous as possible from any servers. Common uses include: anonymous proxies similar to The Anonymizer, other personal uses, VPN-like functionality, and others. It’s very simple to install, and very configurable.
When an HTML resource is retrieved, it’s modified so that all links in it point back through the same proxy, including images, form submissions, and everything else. Once you’re using the proxy, you can browse normally and (almost) forget it’s there.
Configurable options include text-only support (to save bandwidth), selective cookie and script removal, simple ad filtering, access restriction by server, custom encoding of target URLs and cookies, and more– there are more than 50 options so far.
I have installed this script myself in a password protected directory for personal use. Here is a Google Hack I thought up to find some CGI-Proxies available for public use (intentionally or by accident):Google Hack 
Not all proxies found will work, but some will do. You can use those to circumvent any filtering mechanism preventing you from opening a specific web page. But be aware that any information you send across this connection can be monitored and logged by the script’s owner!