[CentOS] ntpd appears to not be able to query ntp servers automatically?

Ryan Pugatch rpug at linux.com
Mon Jan 11 18:13:51 UTC 2010

Hello all,

After reboot, one of my servers running CentOS5 no longer keeps its 
clock synced automatically.  ntpd is running and I don't see anything 
weird being logged.  If I kick off ntpd with 'ntpd -q', it will sync the 
clock.  However, if I just rely on ntpd started with 'service ntpd 
start', syncing does not happen.

I previously had:

# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
server     # local clock
fudge stratum 10

and noticed that ntpd would fail down to using the undisciplined local 
clock if I checked with ntpstat.  I commented those out, and now ntpstat 
simply says:

   time server re-starting
    polling server every 64

Any idea as to why ntpd -q will sync, but otherwise the clock will not 
stay in sync even when the local clock drifts by several minutes?  It 
worked fine prior to reboot.



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