North American Network Operators Group

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Re: YouTube IP Hijacking

  • From: Neil Fenemor
  • Date: Sun Feb 24 16:23:15 2008

While they are deliberately blocking Youtube nationally, I suspect the wider issue has no malice, and is a case of poorly constructed/ implemented outbound policies on their part, and poorly constructed/ implemented inbound polices on their upstreams part.

On 25/02/2008, at 9:49 AM, Tomas L. Byrnes wrote:

Pakistan is deliberately blocking Youtube.

Maybe we should all block Pakistan.

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Will Hargrave
Sent: Sunday, February 24, 2008 12:39 PM
To: [email protected]
Subject: Re: YouTube IP Hijacking

Sargun Dhillon wrote:

So, it seems that youtube's ip block has been hijacked by a more
specific prefix being advertised. This is a case of IP
hijacking, not
case of DNS poisoning, youtube engineers doing something
stupid, etc.
For people that don't know. The router will try to get the most
specific prefix. This is by design, not by accident.

You are making the assumption of malice when the more likely cause is one of accident on the part of probably stressed NOC staff at 17557.

They probably have that /24 going to a gateway walled garden
box which replies with a site saying 'we have banned this',
and that /24 route is leaking outside of their AS via PCCW
due to dodgy filters/communities.


Neil Fenemor FX Networks