Summary NTP

From: Jackie Wright <>
Date: Mon Apr 23 2001 - 10:48:02 EDT
Hi Sun Managers,

Thanks to everyone who helped me out here I didnt realise just how helpful everyone would be, and a very very special thanks to the following:

Tim Chapman 
Glenn Richards
Kevin Buterbaugh
Hendrik Visage 
Pete Simpson
Justin Stringfellow
Al Hopper
Thomas Knox 
Paraic O'Ceallaigh
Kent Perrier

To configure your network to have an Internal Time Server is quite straight forward (Of course when you know how and from a little help from your Sun Mangagers).

Our setup will include one Master server, our Master server will sync itself with an external local server, with a purely outgoing connection for security reasons.  Our internal servers will then in turn sync with our Master Server.

Before starting this service check all your servers time, if they are out of sync initially they may fail to sync at all, or this process will take a long time.Alternatively, use more frequent polling and likely, disable the local self fallback options in order to force NTPs hand. If your time is out by a good deal then consider using date a NNNN to adjust the clock by hand in order to bring it within 5 mins of the NTP server you want to sync against.

The 3 main steps are as follows:

1. Create your ntp.conf file, this is a copy of your ntp.server file with all the appropriate amendments.
2. Start your NTP daemon.
3. Configure your client.

Create your ntp.conf file with all your options, for details of these options see the links below for the documentation.

Once you have configured this file you need to start your xntpd daemon as follows:
/usr/lib/inet/xntpd &

Then you need to configure your clients to look at your master time server, which may look something like the following:

server local.NTP.server.IP prefer minpoll 8 maxpoll 12 

# Fudge local self synch as "worst case fallback" server 
fudge stratum 9 enable auth monitor 
driftfile /var/ntp/ntp.drift 
statsdir /var/ntp/ntpstats/ 
filegen peerstats file peerstats type day enable 
filegen loopstats file loopstats type day enable 
filegen clockstats file clockstats type day enable

If there is anyone out there who would like additional information on how I have set this up, please dont hesitate to contact me at this address. 

Here are some very excellent links if more information is required

Where you'll find everything under the Sun for the
Received on Mon Apr 23 15:48:02 2001

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