nanog mailing list archives

Re: [EXT] AS hijacking (Philosophy, rants, GeoMind)


From: Christopher Morrow <morrowc.lists () gmail com>
Date: Fri, 29 May 2020 12:58:26 -0400

are you sure it was really udel? and not someone pretending to be udel
from a random IX peering?

On Fri, May 29, 2020 at 12:03 PM Justin Wilson (Lists) <lists () mtin net> wrote:

I will probably just get another link to https://isbgpsafeyet.com/ like I did in the first e-mail. LOL


Justin Wilson
j2sw () mtin net

—
https://j2sw.com - All things jsw (AS209109)
https://blog.j2sw.com - Podcast and Blog

On May 29, 2020, at 11:57 AM, Chuck Anderson <cra () WPI EDU> wrote:

Go back to them and tell them that a hijacked prefix is different from a hijacked AS.

On Fri, May 29, 2020 at 11:39:46AM -0400, Justin Wilson (Lists) wrote:

One of the companies I work for recently had an issue with AS 2 (University of Delaware) hijacking a prefix.  Due to 
Origin AS, good upstreams, and the like this has not really affected the traffic to the legit blocks.  However, 
GeoMind picked this up almost immediately it seems.  The IP blocks when you go to speedtest.net come back to the 
university of Delaware. This seems to be the only issue at the moment so we are working through contacting the peers 
of AS2 and asking them to look into this.  We had also contacted University of Delaware.

Here is where the philosophy comes into play.  The very terse e-mail we received back was basically “As2 gets 
hijacked a lot and it’s not our problem”. So my question for the NANOG folks.  At what point do you say “it’s not 
your problem” when it involves your ASN?

Rant
I almost always have issues with GeoMind and others when it comes to IP space.  Several of my folks have received 
allocations from Arin in March.  A few are still fighting with geolocation stuff with a few of the providers.  So why 
does GeoMind atomically accept a hijacked prefix as correct? All the right boxes have been ticked.  Origin 
Validiation, registry sets, etc.





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