Why is ntpd not updating the time on my server?

Posted by John on Server Fault See other posts from Server Fault or by John
Published on 2011-01-10T20:39:11Z Indexed on 2011/01/10 20:55 UTC
Read the original article Hit count: 300

Filed under:

ubuntu

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time

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ntp

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ntpd

I have ntpd running on my server. It's all the default settings, except I commented out its ability to be a server to other machines:

# restrict -4 default kod notrap nomodify nopeer noquery                                                                    
# restrict -6 default kod notrap nomodify nopeer noquery   
restrict default ignore

If I run ntpdate -q ntp.ubuntu.com, I'm told that my machine's clock is off by 7 seconds.

What's going on? How can I diagnose what's happening, is there a log I can turn on?

more info #1

# ntpq -np
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
 91.189.94.4     193.79.237.14    2 u   30   64    7  108.518   -0.136   0.361

more info #2 Here's what this looked like when I asked the question:

# ntpdate -q ntp.ubuntu.com
server 91.189.94.4, stratum 2, offset 7.191308, delay 0.13310
10 Jan 20:38:09 ntpdate[31055]: step time server 91.189.94.4 offset 7.191308 sec

And here's what it looks like now, after restarting ntpd a couple times (I'm assuming that's what fixed it):

# ntpdate -q ntp.ubuntu.com
server 91.189.94.4, stratum 2, offset 0.000112, delay 0.13164
10 Jan 20:47:03 ntpdate[31419]: adjust time server 91.189.94.4 offset 0.000112 sec

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