Opening banned websites....

try using there IP address ..
http:// ip-add..
(who to get ip address ..go to cmd ping the website )
if your admin is smart u can even try the next method...

convert the ip address to dword,octal,hexadecimal form ...
to calculate manually ... refer :-http://www.pc-help.org/obscure.htm

or google for convertors ip to dword..binary,octal..etc ..njoy