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Date:      Mon, 24 Feb 2014 13:52:27 +0000
From:      "Poul-Henning Kamp" <phk@phk.freebsd.dk>
To:        Joe Holden <lists@rewt.org.uk>
Cc:        freebsd-current@freebsd.org
Subject:   Re: ntpd replacement (Was: Re: Import of DragonFly Mail Agent)
Message-ID:  <45248.1393249947@critter.freebsd.dk>
In-Reply-To: <530B2DEE.3030808@rewt.org.uk>
References:  <20140223211155.GS1699@ithaqua.etoilebsd.net> <CAFY7cWBh0ThajQpK4wZYj0wPrhTL608wtNDQNvOLnryjp4_jCg@mail.gmail.com> <530B13CA.6000005@rewt.org.uk> <33612.1393235765@critter.freebsd.dk> <20140224100036.GA1699@ithaqua.etoilebsd.net> <530B2500.5030608@rewt.org.uk> <37319.1393239415@critter.freebsd.dk> <530B2750.3050200@rewt.org.uk> <20140224110842.GA83610@ithaqua.etoilebsd.net> <530B2953.3030901@rewt.org.uk> <20140224111745.GA13864@roberto-aw.eurocontrol.fr> <530B2C7E.3050208@rewt.org.uk> <530B2DEE.3030808@rewt.org.uk>

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In message <530B2DEE.3030808@rewt.org.uk>, Joe Holden writes:

>The other point I should make here is that if you care that much about 
>time security you shouldn't be contacting ntp servers over 3rd party 
>networks anyway, at least not without some IP-level 
>encryption/authentication, or use a source that can't easily be used as 
>an attack surface, such as GPS/MSF etc.

Please check how NTP is authenticated before giving bad advice,
it's all in the RFC.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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