Things to remember while getting access to your favourite sites using Proxy Sites....

There are some sites which provide access to the blocked sites.If you are using some proxy sites like mathtunnel or similar sites you have to take care a little while using. When i used these kind of proxy sites in my company I was traced easily and the next moment all those sites blocked, and the company error messages shows "policy violation" this message may differs with respect to the companies. What all you have to do is delete all your cookies, Internet Temp files and history and all those things in your browser right after the usage of a proxy site one more thing u can do is open a note pad and write like this

cd %homedrive%%homepath%
ipconfig /flushdns
ipconfig /release
ipconfig /renew

and save as do.bat. So the name of this notepad is do (name of my bat file is do, you can give any name) and extension is bat. Put that file in your desktop or anywhere as you wish. So two things you have got to do in parallel. that is(1) clearing the history, cookies, Internet temp files etc and (2) do double click to the do.bat file which you have created. And some more things are left out to do, that is whatever sites you visited all the details will be stored in a file named index.dat. Just do a search for this and find out.you have got to delete these files too in order to remove the traces. Some index.dat files you cannot delete if you are just a user and not the administrator. To delete these files you should boot your system in safe mode with command prompt and you should remember the address for all the files and you should know the administrator password and you can delete. The web browser which I prefer is Mozilla. Because this has got more security options compared to internet explorer. And delete the files in Temporary folder.
Even though your browsing activities are monitored in real time you can do something in your way. Any way you are not hidden to the server which you use. You are always monitored when you are in a company or in an organization. So be careful.