use https protocol, a friends office gave all employees a laptop, blocked everything but he uses https protocol to access any website
ya in my office also HTTPS protocol was used to access facebook..but later admin blocked that too...
@sid_gupta: buddy if any website is blocked in cyberoam then u can use google cache to access that website but the content will be little old....
because if google is not blocked then cyberroam thinks its google url u r visiting & doesn't block...
but cyberroam is paid tool & it has got the power to block the google cache too..