-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Simon Billis Sent: Thursday, August 12, 2010 8:14 To: 'CentOS mailing list' Subject: Re: [CentOS] Date drift and ntpd
Hi,
Jason Pyeron sent a missive on 2010-08-12:
We have a local time server and all of our machines are
pointed at it
for the time.
How can the clock drift by a day and a half?
[root@devserver21 ~]# date Fri Aug 13 14:43:29 EDT 2010 [root@devserver21 ~]# rdate -s 192.168.1.67 [root@devserver21 ~]# date Thu Aug 12 07:02:39 EDT 2010 [root@devserver21 ~]# cat /etc/ntp.conf | grep -v ^# |
grep -v ^$
restrict default nomodify notrap noquery restrict
127.0.0.1 server
192.168.1.67 server 192.168.1.66 server 192.168.1.65 server 127.127.1.0 # local clock fudge 127.127.1.0 stratum 10 driftfile /var/lib/ntp/drift broadcastdelay 0.008 keys /etc/ntp/keys
Hi,
It is unlikely that the machine in question drifted
forward in time
if ntpd was running. Have a look at the logs /var/log/messages it should contain the ntpd log messages
[root@devserver21 ~]# grep ntpd /var/log/messages </snip>
/SNIP
Jul 29 17:47:24 devserver21 ntpd[3475]: synchronized to LOCAL(0), stratum 10 Aug 12 22:48:29 devserver21 ntpd[3475]: sendto(192.168.1.66): Operation not permitted [root@devserver21 ~]# uptime 08:10:19 up 164 days, 9:56, 2 users, load average: 0.20, 0.54, 0.81 [root@devserver21 ~]#
What happened between July 29 and now? Is there nothing in the logs for that period?
Nothing of note, I do have full logs from those days... [root@devserver21 ~]# grep ' 00:00:.. devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd' /var/log/messages Jul 26 00:00:37 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Jul 27 00:00:47 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Jul 28 00:00:44 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Jul 29 00:00:41 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Jul 30 00:00:08 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Jul 31 00:00:08 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 1 00:00:14 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 2 00:00:22 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 3 00:00:11 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 4 00:00:58 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 5 00:00:06 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 6 00:00:06 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 7 00:00:03 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 8 00:00:43 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 9 00:00:16 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 10 00:00:08 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 11 00:00:34 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 12 00:00:19 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd Aug 13 00:00:20 devserver21 arpwatch: bogon 192.168.1.67 0:30:67:0:cf:fd [root@devserver21 ~]#
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