This started happening yesterday when I was talking to a friend on Facebook. All the LEDs were green on the router and the modem, I went on the router configuration page, and went to the Status bar, and it was giving me the DNS "0.0.0.0". So I tried to power cycle both of them, and even resetting the router to factory defaults. Same problem occurred. I don't know what I did, but it fixed it for the evening. I woke up this morning to check my email, and the incident reoccurred.
Is this a problem on your end? If so, what's the problem? If not, what can I do to solve it?