Originally posted by Vulcan
Still awaiting a response SIG220.
I wouldn't hold your breath.
Anyway, the problem is that the government contacted 17 ISPs within their reach, and all had them put in null routes in BGP for the networks controlled by Youtube.
Then, unfortunately, PCCW allowed those null routes to slip into it's backbone. Then... the rest of the world picked it up, and suddenly Youtube looked like it was in Pakistan. Even in America, a traceroute would take you to Pakistan until ISPs started filtering and getting things under control.
The internet is a federation of systems, called autonomous systems, that rely on trust between each other. It's easy to inject 'poison' routes into the system, at least for a short while.