A proxy that focuses on WWW traffic is called a "web proxy".It's most common use is as a "web-cache". It provides a mean to deny access to certain URLs in a blacklist, thus providing content filtering. Some web proxies reformat web pages for a specific purpose or audience.
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This is a CGI Proxy Service that is used to bypass blocking of secure network connections. It can also be used as an anonymizer. VTunnel allows for the HTTP Form Post method which means that websites that require a login will work with VTunnel.