RE: Timestamp

["Kenneth Goodwin" <kgoodwin datamarktech com>]

actually, make one  of your servers a Primary stratum level 2 or 3 clock
source and sync itself to a couple of stratum level one or preferably level
TWO clock sources (Search for NTPD for more info and manuals and a list of
stratum
level one and two clock providers out on the Internet)

Sync two others in a stratum level 2 or 3 cluster with the primary and have
them use Multicast or Broadcast
services to provide clock time to your other hosts. This is a three node
time cluster that will sync with itself
even if the internet source goes down.

Then setup NTPD on the rest of the boxes as clients using multicast or
broadcast to Receive the time updates from the primary server and it's two
secondarys.

NTPDATE is too one time to use in CRON and takes a while to resolve times.
Also one clock source server only configs tend to be prone to failures
elsewhere when they crash, better to have few main local clock sources
synching to each other and a couple of others out on the Internet.

If you have a cisco router on your internet, it can setup to be a stratum 2
primary NTP clock server and also filter via access lists time protocol
packets such that they are only allowed from designated source IP's.


++> -----Original Message-----
++> From: enigma-list-admin redhat com
++> [mailto:enigma-list-admin redhat com]On Behalf Of Nataniel Klug
++> Sent: Thursday, November 21, 2002 7:06 AM
++> To: enigma-list redhat com
++> Subject: Re: Timestamp
++>
++>
++>     Andrew,
++>
++>     You mean that if I use one of my boxes as a clock
++> server, I will have a perfect
++> syncronize in the others? I will try this.
++>
++> Nataniel
++>
++> ----- Original Message -----
++> From: "Andrew Kelly" <akelly transparency org>
++> To: <enigma-list redhat com>
++> Sent: Thursday, November 21, 2002 8:44 AM
++> Subject: Re: Timestamp
++>
++>
++> : What about using ntpd instead? Run the deamon on one box, pointing
++> : at a stratum 1 server. Then you can call ntpdate on that box
++> : (now stratum 2) using cron.
++> :
++> :
++> : Nataniel Klug wrote:
++> : >
++> : >     Hello,
++> : >
++> : >     I syncronize my boxes using rdate. I to a comand likle this:
++> : >
++> : > File: /etc/crontab
++> : > 30 6 * * * root rdate -s ntp0.fau.de
++> : > 31 6 * * * root /usr/sbin/setclock
++> : >
++> : >     But in one of my box I receive a message that
++> external machines can not determine
++> the
++> : > clock of that box, so they can not syncronize files or
++> anything. It is generatin an
++> error
++> : > in my MRTG Monitoring Tool with the timestamp wrong.
++> Can I solve this?
++> : >
++> : > Best regards,
++> : >
++> : > Nataniel Klug
++> : > www.cnett.com.br
++> :
++> : --
++> : Andrew Kelly
++> : IT
++> : Transparency International
++> : Otto-Suhr-Allee 97/99
++> : 10585 Berlin, Germany
++> : Tel: +4930 3438 2026, Fax: +4930 3470 3912
++> : AKelly transparency org
++> :
++> :
++> :
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++> : enigma-list redhat com
++> : https://listman.redhat.com/mailman/listinfo/enigma-list
++> :
++>
++>
++>
++>
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