Cannot connect to google and banking websites suddenly
I have a macbook pro with OS X (10.9.5) and have been accessing websites without any issues - google.com, youtube.com, and several banking websites as well (e.g.: citibank.co.id. ) 3 days ago, suddenly I get "cannot connect to the server" for these websites. When I change my browser to firefox, i can't access these websites either. When I search via Yahoo.com, I will see in the search results youtube references there, but when I click inside, youtube becomes black screen only. I AM able to access ted talks, Facebook, and some other websites that don't require authentication. Please help.