From owner-freebsd-security@FreeBSD.ORG  Wed Dec 24 16:47:30 2014
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Date: Wed, 24 Dec 2014 17:42:16 +0100
From: Andrei <az@azsupport.com>
To: freebsd-security@freebsd.org
Subject: Re: FreeBSD Security Advisory FreeBSD-SA-14:31.ntp
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On Wed, 24 Dec 2014 00:33:09 +0100 (CET)
FreeBSD Security Advisories <security-advisories@freebsd.org> wrote:

> No workaround is available, but systems not running ntpd(8) are not
> affected.  Because the issue may lead to remote root compromise, the
> FreeBSD Security Team recommends system administrators to firewall NTP
> ports, namely tcp/123 and udp/123 when it is not clear that all
> systems have been patched or have ntpd(8) stopped.

Why tcp/123?

Kind regards,
Andrei.