China prefix hijack

Thu Apr 8 17:19:35 UTC 2010

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 at 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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