If you are lucky enough, bypassing the proxy at your workplace or school can be as simple as disabling it in your web browser. Verify Internet settings in your web browser and check to see if the proxy server details are created in your web browser. If they are, so try disabling them and connect to the Internet again. You may find that with a little luck proxy server is disabled, but you are now able to access the web normally.
Many schools and offices block specific websites (such as social networking and classified sites), and it is usually why you may have problems getting access to them. They do this usually with the aim to stop students or employees from wasting valuable time online visiting unproductive websites. But your school or office does not and can not block the entire Internet. Instead they block specific sites based on their website url. Therefore you are also free access to a proxy server which then redirects your connection to the desired site gives you access to the blocked site even from work or school.
To bypass a proxy server, you first need to see if your web browser at work or school is set to access the proxy. Disable it and try again. As a last resort, you can put your own elite proxy to access the websites while at work or school.