nanog mailing list archives

RE: China prefix hijack


From: "Joe" <jbfixurpc () gmail com>
Date: Thu, 8 Apr 2010 13:27:40 -0400

Just wondering if this was a "Fat fingered" mistake or intentional...


-J

-----Original Message-----
From: Frank Pater [mailto:fpater () dca net] 
Sent: Thursday, April 08, 2010 1:20 PM
To: nanog () nanog org
Subject: Re: China prefix hijack


Hi,

We received BGPmon notifications for all of our prefixes as 
well. Not sure if it's relevant, but this is also announced 
upstream from us by 3491. Example:

====================================================================
Possible Prefix Hijack (Code: 10) 
====================================================================
Your prefix:          216.158.0.0/18:
Update time:          2010-04-08 15:58 (UTC)
Detected by #peers:   1
Detected prefix:      216.158.0.0/18
Announced by:         AS23724 (CHINANET-IDC-BJ-AP IDC, China 
Telecommunications Corporation)
Upstream AS:          AS4134 (CHINANET-BACKBONE No.31,Jin-rong Street)
ASpath:               39792 4134 23724 23724


--
Frank Pater
DCANet
http://www.dca.net
voice: 888-4-DCANET (888-432-2638)
fax: 302-426-6386


On Thu, Apr 08, 2010 at 12:39:57PM -0400, Chris McDonald wrote:
i think so yeah

AS 23724 is now announcing 63.218.188.0/22 which is historically 
announced by ASes: 3491.
Time: Thu Apr  8 16:55:02 2010 GMT
Observed path: 812 174 4134 23724 23724


On Thu, Apr 8, 2010 at 12:33 PM, Grzegorz Janoszka 
<Grzegorz () janoszka pl>wrote:


Just half an hour ago China Telecom hijacked one of our prefixes:

Your prefix:          X.Y.Z.0/19:
Prefix Description:   NETNAME
Update time:          2010-04-08 15:58 (UTC)
Detected by #peers:   1
Detected prefix:      X.Y.Z.0/19
Announced by:         AS23724 (CHINANET-IDC-BJ-AP IDC, China
Telecommunications Corporation)
Upstream AS:          AS4134 (CHINANET-BACKBONE 
No.31,Jin-rong Street)
ASpath:               39792 4134 23724 23724

Luckily it had to be limited as only one BGPmon peer saw 
it. Anyone 
else noticed it?

--
Grzegorz Janoszka







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