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IPv4 and IPv6 hijacking by AS 6

Subject: IPv4 and IPv6 hijacking by AS 6
From: bjorn at mork.no (Bjørn Mork)
Date: Fri, 13 Apr 2018 10:13:47 +0200
In-reply-to: <CA[email protected]> (Anurag Bhatia's message of "Fri, 13 Apr 2018 07:55:36 +0530")
References: <CA[email protected]> <15[email protected]> <CA[email protected]> <CA[email protected]> <CA[email protected]>

Anurag Bhatia <me at anuragbhatia.com> writes:

> Similar for AS2.

I believe we've seen bogus low AS number announcements a few times
before, and they've usually been caused by attemts to configure
AS path prepending without understanding and/or reading the docs.

Someone might have wrongly assumed that

   set as-path prepend 133711 133711

could be written shorter like

   set as-path prepend 133711 2

and there you go...




BjÃ¸rn

Follow-Ups:
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- IPv4 and IPv6 hijacking by AS 6
  - From: cash at udel.edu (Jason S. Cash)
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  - From: randy at psg.com (Randy Bush)

References:
- IPv4 and IPv6 hijacking by AS 6
  - From: matt at netfire.net (Matt Harris)
- IPv4 and IPv6 hijacking by AS 6
  - From: lists at as23738.net (lists at as23738.net)
- IPv4 and IPv6 hijacking by AS 6
  - From: matt at netfire.net (Matt Harris)
- IPv4 and IPv6 hijacking by AS 6
  - From: job at instituut.net (Job Snijders)
- IPv4 and IPv6 hijacking by AS 6
  - From: me at anuragbhatia.com (Anurag Bhatia)

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