[182585] in North American Network Operators' Group
Re: 20-30Gbps UDP 1720 traffic appearing to originate from CN in last
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Fri Jul 24 03:44:01 2015
X-Original-To: nanog@nanog.org
To: "Justin M. Streiner" <streiner@cluebyfour.org>
In-Reply-To: Your message of "Thu, 23 Jul 2015 09:25:33 -0400."
<Pine.LNX.4.64.1507230908380.21935@whammy.cluebyfour.org>
From: Valdis.Kletnieks@vt.edu
Date: Thu, 23 Jul 2015 14:45:30 -0400
Cc: "nanog@nanog.org" <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
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On Thu, 23 Jul 2015 09:25:33 -0400, "Justin M. Streiner" said:
> If a customer is legitimately trying to reach someone in one of the
> affected IP ranges and failing, at some point, they will either a) give up
> and try later, or b) contact their provider to try to find out what's
> going on.
You missed (c) give up after a few days of retrying and figure the destination
has folded and gone dark, and not bother trying anymore.
It's particularly likely to happen if you haven't given *detailed* instructions
to the people who answer your phones *and* a host they can test from *outside*
your blocking. If your help desk responds with "It doesn't seem to be up
for me either", outcome (c) is almost guaranteed...
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