In order to gain acess to a proxy website u foirst need a proxy to bypass the local server. One known proxy that i use on a work computer is 18.104.22.168 and port 8080
this works well for me on a real strong webfilter.can gain acess to most anysite using it. How ever on some allowed sites such as google searches etc. it will prompt you thinking ur search was automatically genearted from virus and spyyware and u have to eneter the given scripts to prove u r human. Another cool way to surf around any thing at all is by using IP Tunnel. The safest way i found of using this and leaves no traces. Is full install of a webboirwser on a USB flash drive, and also configure the Ip Tunnel in with it. u r surfing the web in freedom from ur usb drive. Just be careful Its much easier for us at work to get away with this. At school it may not be such a great idea. But all these options work .