topic Re: time syncronization linux w2k in Operating System - Linux

time syncronization linux w2k

mathe karoly — Mon, 01 Sep 2003 05:56:02 GMT

Hi all,
I try to syncronize the clock of a win2k server sp3 (is a domain controller) and a linux RedHat 7.3. The win2k take the tme from an external source and distributed it in the local network.On linux side the ntpd daemon is running and it recognize the w2k server but it won't set its time. with ethereal I saw that the two machines exchange the ntp packet buttime on linux side is not changed to the correct time.

can help me somebody?

Kind regards Karoly

Re: time syncronization linux w2k

Vitaly Karasik_1 — Mon, 01 Sep 2003 06:06:29 GMT

what is your settings for ntp on linux and Windows sides?

Vitaly.

Re: time syncronization linux w2k

Peter Reuschlein — Mon, 01 Sep 2003 06:35:07 GMT

hi,

are there any error messages on the logs?

perhaps your time on the linux system is very diffrent from the time on the windows machine

the time deamon can only fix times that are around some seconds diffrent else it wont work

greetz
Peter

Re: time syncronization linux w2k

Balaji N — Mon, 01 Sep 2003 08:10:17 GMT

as usual,
any errors / messages in the logs.
-b-

Re: time syncronization linux w2k

Steven E. Protter — Mon, 01 Sep 2003 12:54:58 GMT

HP-UX has a command.

ntpq -p

There may be a Linux equivalent to test time sources.

Windows 2000 do not have proper Unix compliant time servers. In some cases time will update, in others it will not. The way to resolve the problem is to download and install Dr. David Mills(The inventor of ntp) NT/W2K time server package on the Windows 2000 server.

I could not convince my own PCS department of this wisdom. I have to check my servers at least once a week to see if they are still keeping good time. The ntpq command produces an error. You can achieve good time keeping with one of two approaches:

Install this software on the W2K time server:
http://www.eecis.udel.edu/~mills/ntp/html/hints/winnt.html
Read carefully its not obvious.

Use a real Unix/Linux workstation as a time server.

SEP

Re: time syncronization linux w2k

Caesar_3 — Mon, 01 Sep 2003 18:44:36 GMT

Hello!

What the time difrence that you have?
Could be that the difrence is the difrence of
linux TZ time a Win time?

Caesar

Re: time syncronization linux w2k

Jared Middleton — Tue, 02 Sep 2003 03:46:46 GMT

When I had a similar issue I found setting up the NTP daemon to be slightly more complicated than I cared for, so I simply wrote a little script for cron to run once every morning...

$cat /etc/cron.daily/setdate

#!/bin/sh
# setdate - script to synchronize the date/time on this server with
# the corporate file server.
# executed daily by cron (see cron.daily directory)

# Main Windows file server (in Seattle)
server=SVR-ROOT-DC1
logfile=/var/log/${0##*/}

echo "====================================" >> $logfile
echo "Before: `date` " >> $logfile
/usr/sbin/ntpdate $server >> $logfile
echo " After: `date` " >> $logfile

-Jared

Re: time syncronization linux w2k

mathe karoly — Tue, 02 Sep 2003 07:25:57 GMT

Here are the concatenated log and conf file for ntpd. As you can see sometimes ntpd can syncronize with w32 service but after it's a message for lost syncronization and after is a bad packet sent to the time server.

The result of the ntpq-p is at the and of ntp.log

Maybe this can help

Thank you

Re: time syncronization linux w2k

Balaji N — Tue, 02 Sep 2003 07:45:14 GMT

hmmm.. bad. i am unable to open the log. i get a 404. will report to Dan. by the way is it only me or everyone who gets this problem.

can u try reposting the log.
thanks
-balaji

Re: time syncronization linux w2k

mathe karoly — Tue, 02 Sep 2003 08:07:07 GMT

Re: time syncronization linux w2k

Bob_Vance — Wed, 03 Sep 2003 09:50:03 GMT

BTW, I find it a lot more convenient to put all the active (uncommented) statements in the "ntp.conf" file at the *beginning*, so that you can see at a glance what you've got, rather than dispersing them throughout the comments. You can always scroll down to the comments if you forget exactly what the statements are doing ;>)

It looks to me that you've got 2 guys running, or trying to run:
xntpd
and ntpd
.
Did you download and compile your own latest version of the code? When you do this, the 'make' build produces 'ntpd'. Also, it looks like the latest rpm uses 'ntpd'.

I'm not sure of the origin of "xntpd", but I also run the ntp daemon as 'xntpd', mainly because that's the way HP did it for HP-UX, so when I was building for HP-UX, I kept the "xntpd" name. This means, of course, that after the build, I have to do my own manual install and change it from 'ntpd' (actually, I simply do symbolic links).

bv