[168699] in North American Network Operators' Group
Re: TWC (AS11351) blocking all NTP?
daemon@ATHENA.MIT.EDU (Valdis.Kletnieks@vt.edu)
Mon Feb 3 13:40:54 2014
To: "John Levine" <johnl@iecc.com>
In-Reply-To: Your message of "03 Feb 2014 18:23:31 +0000."
<20140203182331.8608.qmail@joyce.lan>
From: Valdis.Kletnieks@vt.edu
Date: Mon, 03 Feb 2014 13:38:58 -0500
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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On 03 Feb 2014 18:23:31 +0000, "John Levine" said:
> It seems thata hosts sending large amounts of NTP traffic over the
> public Internet can be safely filtered if you don't already know that
> it's one of the handful that's in the ntp.org pools or another well
> known NTP master.
You have that backwards - you can (possibly) safely filter it if you
can establish *for certain* that it *isn't* in the ntp.org pools.
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