Subject: Re: ntp problems?
To: Jim Bernard <email@example.com>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 01/22/2004 10:15:12
In message <20040122142317.GA14974@zoo.bernard.org>, Jim Bernard writes:
>On Thu, Jan 15, 2004 at 03:53:02PM -0600, Frederick Bruckman wrote:
>> On Wed, 14 Jan 2004, Steve Bellovin wrote:
>> > server raptor.research.att.com
>> > server 220.127.116.11
>> Also, two servers is not a good number to have, as
>> there's no way for the daemon to know which one is correct when they
> (Still trying to catch up on mail after the holidays.)
> Actually, the recommended configuration is to use at least 3. See, e.g.,
>from which I quote:
> It is vital to carefully consider the issues of robustness and reliability
> when selecting the sources of synchronization. Normally, not less than thr
> sources should be available, preferably selected to avoid common points of
> failure. It is usually better to choose sources which are likely to be "cl
> to you in terms of network topology,...
>The daemon goes to a lot of trouble to determine which server currently
>has the best time.
Understood. But if the daemon is going to misbehave that badly with
two servers configured, what happens if one of three configured servers
--Steve Bellovin, http://www.research.att.com/~smb