YouTubeサーヴィス中断はパキスタン発ホンコン経由？
YouTubeサーヴィス中断の原因はパキスタン発
- YouTubeがダウン--原因はパキスタンでのアクセス遮断か:ニュース - CNET Japan (2008/02/25 11:35)
一方、BBCは、 YouTubeのアクセス障害について、パキスタン政府が同サイトへのアクセス遮断しようしたことが原因ではと報じている。YouTubeに多くのイスラム教徒を怒らせる内容の、預言者ムハンマドの漫画がYouTubeに掲載されたことから、パキスタンは同日、サイトへのアクセスを遮断した。
パキスタン政府がアクセス遮断に失敗したのが原因？ そんな弱いのかインターネット
- ［WSJ］ YouTubeの世界的障害、原因はパキスタンの検閲 - ITmedia News (2008年02月26日 11時48分)
2月24日、米Google傘下のYouTubeで数時間にわたりサービスが中断された。パキスタン政府がイスラムに批判的なビデオへのアクセスを遮断しようとして失敗したためという。
この問題はまだYouTubeが調査中だが、グローバル通信インフラの脆弱さを浮き彫りにしている。またこの障害の特異な状況は、かねてより政治的緊張を抱えるパキスタンなどの国家で、YouTubeのようなサイトが政治批判コンテンツの拡大において演じている役割が拡大していることも示している。
ホンコンのISPのPCCWが中継に失敗したとか
- Insecure routing redirects YouTube to Pakistan (February 25, 2008 - 03:31AM CT By Iljitsch van Beijnum)
What apparently happened is that Pakistan Telecom routed the address block that YouTube's servers are into a "black hole" as a simple measure to filter access to the service. However, this routing information escaped from Pakistan Telecom to its ISP PCCW in Hong Kong, which propagated the route to the rest of the world. So any packets for YouTube would end up in Pakistan Telecom's black hole instead.
合衆国やヨーロッパもPCCWに依存していた
- How Pakistan knocked YouTube offline (and how to make sure it never happens again) | Tech news blog - CNET News.com (February 25, 2008 2:30 PM PST Posted by Declan McCullagh)
The security weakness lies in why those false instructions, which took YouTube offline for two hours on Sunday, were believed by routers around the globe. That's because Hong Kong-based PCCW, which provides the Internet link to Pakistan Telecom, did not stop the misleading broadcast--which is what most large providers in the United States and Europe do.
パキスタン政府のようにISPへの権力が強い場合、話は簡単なはずだが
- YouTube Censorship Sheds Light on Internet Trust - Security Fix (February 25, 2008; 11:08 AM ET By Brian Krebs)
In a country where the government more or less can tell resident ISPs what to do, blocking citizens from visiting certain sites is simple: The ISPs simply tell their customers that if they're looking for a censored site, they either receive an empty page or are redirected to wherever the ISP or government deems as an appropriate substitute destination.
But, if those same ISPs allow their internal blocking instructions to propagate out to their externally-facing routers - the ones that communicate with the wider Internet - such actions can have far-reaching implications, as we saw with YouTube on Sunday.
パキスタンでインターネット利用者が減る原因になりかねない
- Pakistan orders Youtube blocked over cartoons | Technology | Internet | Reuters (Feb 24, 2008 9:09am EST Writing by David Fox)
Attempts to access Youtube in Islamabad on Sunday were met with a generic error message saying the site was unavailable.
"Users are quite upset. They're screaming at ISPs which can't do anything," Siraj said.
"The government has valid reason for that, but they have to find a better way of doing it. If we continue blocking popular Web sites, people will stop using the Internet."
