Hi UncleUB Are you using GoogleDNS ?
Only...
I've experienced exactly the same problem a couple of times in the last week
Started : Last Tuesday Night ... Rebooted Router ... Back To Normal!
Few Days Later : Same Thing ... Rebooted Router ... Back To Normal!
Wednesday Morning : Same Again
Rebooted Router ... Back To Normal!
Seems OK at the minute!
Don't really want to change back to AOL DNS / Talk Talk DNS as they are really bad.
And I didn't like Open DNS... Seemed much slower than Googles.
Google DNS has served me well up to now... Pray that isn't about to change
Zoe