This one has got me !
It's tax time here in Canada. and all my PCs at home timeout when I try to access any Government of Canada website. I have tested many.

www.cra-arc.gc.ca/
www.canada.gc.ca
www.forces.gc.ca

BUT if I type just the IP address of the site I get there !

198.103.238.30

Seems any website that ends in gc.ca my browsers say "Page cannot be displayed" Happens with EI7 and Firefox2

Seaching the web I see that other people are having the same problem.
My Spybot is up to date but still no access.

Any ideas ?