[geeks] How did Pakistan block YouTube?

[Aaron Finley]

Geoffrey S. Mendelson wrote:
> According to the news articles, Pakistan blocked YouTube for most of
> the world over the weekend. How did they do it?
> 
> Geoff.

http://arstechnica.com/news.ars/post/20080225-insecure-routing-redirects-youtube-to-pakistan.html:

"In the case of YouTube and Pakistan Telecom, YouTube injected the 
address block 208.65.152.0/22 (208.65.152.0 - 208.65.155.255) in the 
Internet's routing tables, while Pakistan Telecom advertised the 
208.65.153.0/24 (208.65.153.0 - 208.65.153.255) block. So even though 
YouTube's routing information was still there, packets would flow 
towards Pakistan Telecom because of the longest match first rule."

Slashdot had an interesting discussion about it yesterday.

-- Aaron