ntpd / time synchronization

Chuck Swiger cswiger at mac.com
Mon Jul 27 22:51:15 UTC 2009

On Jul 27, 2009, at 3:44 PM, Zbigniew Szalbot wrote:
> and here's the details of /etc/ntp.conf file:
> server 0.pl.pool.ntp.org
> server 1.pl.pool.ntp.org
> server 2.pl.pool.ntp.org
> server 3.pl.pool.ntp.org
> driftfile /var/db/ntp.drift
> restrict default nopeer nomodify
> I used to have server 0.europe.pool.ntp.org in the ntp.conf file but  
> today changed all entries to *.pl.pool.*
> At the moment my clock is about 3 minutes behind time. It has been  
> running for a year and I do not have ntpdate enabled so I guess  
> subsequent reboots did not correct the drifting problem.
> Is there anything obvious I am missing here? Any advice would be  
> greatly appreciated!

You can't readily combine a restrict statement with using random  
timeservers from the NTP pool; you would need to list specific servers  
and add blank restrict statements for each server you trust.  What  
you've configured is likely querying the 4 servers listed for time,  
but not trusting their responses so your clock never find a server  
which it is willing to sync to.

Running "ntpq -p -c rv" would be informative....


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