AS11296 -- Hijacked?

George Bonser gbonser at
Wed Sep 29 17:43:32 UTC 2010

> -----Original Message-----
> From: Heath Jones 
> Sent: Wednesday, September 29, 2010 5:16 AM
> To: Ronald F. Guilmette
> Cc: nanog at
> Subject: Re: AS11296 -- Hijacked?
> Let me reword...
> What is stopping someone coming on the list, making a claim like you
> have in an attempt to actually cause a DOS attack, by having some
> clumsy network engineers starting to block traffic in reaction to your
> post?

There would be several filters for this.  Is the person reporting this a
known network operator that people trust or is it some Joe Blow out of
nowhere that nobody has heard of before?  That would make a huge
difference.  Is the AS assigned to a company that is known to be
defunct? That would be another flag.  Why would a company that no longer
exists have its ASN active and its IPs sending traffic?  This would be
particularly interesting if the carrier handling the traffic is not a
carrier known to have a relationship with that AS in the past.  So a
pattern of ... AS works for many years, disappears for some period of
time, company goes defunct, and some period of time later the AS appears
on a completely different carrier without any reassignment from the

Bottom line, there is more to it than someone just popping up on a list
saying something.


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