TWC (AS11351) blocking all NTP?

Dobbins, Roland rdobbins at
Mon Feb 3 04:09:39 UTC 2014

On Feb 3, 2014, at 10:58 AM, Dobbins, Roland <rdobbins at> wrote:

> I'm a big believer in using ACLs to intelligently preclude reflection/amplification abuse, but wholesale filtering of all UDP takes matters too far, IMHO.

I also think that restricting your users by default to your own recursive DNS servers, plus a couple of well-known, well-run public recursive services, is a good idea - as long as you allow your users to opt out.

This has nothing to do with DDoS, but with other types of issues.

Roland Dobbins <rdobbins at> // <>

	  Luck is the residue of opportunity and design.

		       -- John Milton

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