Suspecious anycast prefixes
joey.liuyq at gmail.com
Thu May 5 09:36:50 CDT 2011
On Thu, May 5, 2011 at 3:54 AM, Joe Abley <jabley at hopcount.ca> wrote:
> On 2011-05-05, at 11:46, bmanning at vacation.karoshi.com wrote:
>> On Wed, May 04, 2011 at 10:23:12PM -0500, Yaoqing(Joey) Liu wrote:
>>> AS4555:ASName: EP0-BLK-ASNBLOCK-5;OrgName:Almond Oil Process, LLC.
>>> AS9584:as-name:GENESIS-AP|descr:Diyixian.com Limited|country:HK
>>> AS20144:ASName: L-ROOT;Comment:distributed using Anycast.
>>> AS42909: as-name: COMMUNITYDNS;descr: Internet
>>> Computer Bureau Ltd
>> according to Filip, this is -NOT- supposed to be
>> anycast. the only legal origin ASN is 4555.
>> these other ASNs have hijacked the prefix.
> The source data above may be old, or simply wrong -- I don't see *any* AS originating that prefix right now, and I can confirm specifically AS20144 is not configured to originate it.
This is based on last four year's data(2007-2010)collected from more
than 120 peers around the world. Today it may be not announced
anymore, but it used to be announced by the four ASNs simultaneously.
I just checked the detailed info about this prefix, here it is about
(ASN: average peers announcing this prefix:existing period:total
appearing days: MOAS period: total appearing days)
MY source data
> Perhaps I'm misunderstanding the original question, but the assertion that anybody is hijacking that particular prefix seems false.
This needs to do further analysis to confirm if it was hijacked
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