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Re: [Ntp] Quick review of WGLC for status change for draft-ietf-ntp-update-registries

Miroslav Lichvar <mlichvar@redhat.com> Mon, 15 August 2022 11:03 UTC

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Date: Mon, 15 Aug 2022 13:03:13 +0200
From: Miroslav Lichvar <mlichvar@redhat.com>
To: Heiko Gerstung <heiko.gerstung=40meinberg.de@dmarc.ietf.org>
Cc: Harlan Stenn <stenn@nwtime.org>, "ntp@ietf.org" <ntp@ietf.org>
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Subject: Re: [Ntp] Quick review of WGLC for status change for draft-ietf-ntp-update-registries
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On Mon, Aug 15, 2022 at 12:58:17PM +0200, Heiko Gerstung wrote:
> thanks for the quick response. As far as I can see, mode 7 is "reserved" in the current version of the RFC for NTP, or did I miss an errata?

The RFC says "reserved for private use".

Another thing to consider is that mode 7 might be blocked in firewalls
for all NTP versions to prevent amplification attacks exploiting the
ntpd private protocol (aka ntpdc).

-- 
Miroslav Lichvar

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