Yahoo outage summary

Sun Jul 8 21:47:29 UTC 2007

Yep, soBGP or S-BGP could have prevented this.  But that seems to be a
bridge too far right now.

I don't know about the cause - malicious or accidental - perhaps somebody
from Level3 or Hanaro Telecom can explain the rest of the story.

Marc 

-----Original Message-----
From: Steven M. Bellovin [mailto:smb at cs.columbia.edu] 
Sent: Sunday, July 08, 2007 5:20 PM
To: Marcus H. Sachs
Cc: 'Nanog'
Subject: Re: Yahoo outage summary

On Sun, 8 Jul 2007 15:29:10 -0400
"Marcus H. Sachs" <marc at sachsfamily.net> wrote:

> 
> I put up a diary at the Storm Center
> (http://isc.sans.org/diary.html?storyid=3112) that summarizes what we 
> know about the Yahoo outage on Friday.  If anybody has any additional 
> info they want to share or comments about the write-up please let me 
> know.
> 
In other words, it was yet another BGP screw-up that secured routing could
have prevented.

Any clue about the root cause, i.e., malice or accident?

		--Steve Bellovin, http://www.cs.columbia.edu/~smb