TWC (AS11351) blocking all NTP?

Valdis.Kletnieks at vt.edu Valdis.Kletnieks at vt.edu
Mon Feb 3 18:38:58 UTC 2014


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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