Hello g:
I clicked on that link and got a message that access was blocked by my network administrator. Since I do not have a network administrator, something is bogus.
Open DNS is explained here:
http://www.opendns.com/start/
I used to use it, but have not found it necessary in my own world.
Somehow something has changed your settings.
I have not used it, but some people have had success with this software:
http://www.dnschanger.com/
Barry