Well, sometimes the I.T. department can get lazy and will they modify your "hosts" file to block you from that site. I've seen it quite a bit around my parts for blocking the facebook/myspace/twitter type sites and one day I overheard one of my leads say that they added the website to the hosts file to block it. So if you're curious, search for it (check the box for searching hidden files too) and then when you open it, use notepad to view the contents. It typically only has one entry in it (anything with a # in front of the line doesn't count...commented out), being "127.0.0.1 localhost", however if they used this to block, say espn.com...you would also see an entry like this: "127.0.0.1 www.espn.com".
<hint: save a copy of this file before modifying it...just in case a cat lands on your keyboard just before you hit the delete key.>
So, if you delete the one line with the website you're being blocked from and then save the file changes...close all your web browsers and then reopen and try it again...it might just work. No guarantees, just sayin'...could be....
For windows xp users, the file is located here: C:\WINDOWS\system32\drivers\etc
Reference for anyone curious about the hosts file: http://en.wikipedia.org/wiki/Hosts_%28file%29
My reference above pertains to the section labeled "Internet resource blocking"
Proceed at your own risk
Where we've been:
2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP