nanog mailing list archives

Re: TWC (AS11351) blocking all NTP?


From: Valdis.Kletnieks () vt edu
Date: Mon, 03 Feb 2014 13:38:58 -0500

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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