Virtual server for happy hour

Isaac is supplying Wi-Fi hotspots to a small university. He has deployed a fair number of access points. The president of the university has agreed for Isaac to accept unknown users' authentication attempts on the access point in the canteen between 13:00 and 14:00. This promotion is called Hotspot Happy Hour. Today is April Fools' day and Isaac was granted permission to Rickroll everyone using the canteen's Access Point.

Note

Never been Rickrolled? Consider yourself lucky. You can read more about Rickrolling on Wikipedia: http://en.wikipedia.org/wiki/Rickrolling.