RHEL ntpdate not syncing

leblinux · 11-14-2010, 07:06 AM

Dears,

I have RHEL 5 joined to windows Domain and lately has been delaying in time like 20 - 30 mins off the domain controller. Any ideas why? It suddenly started this delays. I have to login and restart ntpd in order to sync and so users can login.

Here is the output of ntpq -p:

ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
*LOCAL(0) .LOCL. 10 l 58 64 77 0.000 0.000 0.001
<remoteserver to syncfrom dns1>. <2nd remote server dns2> 5 u 54 64 77 0.001 100.034 361.081
================================

I wonder is the * means that its syncing with itself? if yes how to make it to sync with my remote server dc1 (2nd line?)

slimm609 · 11-14-2010, 08:23 AM

posting the config you are using will help a lot. We can not see if it is configured wrong without this information

michaelk · 11-14-2010, 08:32 AM

Yes at the moment the computer is using its internal clock as a time source. If the delay becomes to high i.e. 1000 sec ntpd will quit assuming something is wrong. Stop ntpd and update the clock once either by the following:
ntpd -q
or
nptdate servername

If the computer is turned off the hardware clock might be drifting excessively and the battery might be need to be replaced.

leblinux · 11-14-2010, 03:22 PM

Hello thanks for your help, the server is online 24/7 however it lately started to delay. Here is the output of the ntp.conf file.

By the way Now I had to create an @houry cron job just to restart ntpd every hour.. Until I find a solution.

Quote:

# Permit time synchronization with our time source, but do not
# permit the source to query or modify the service on this system.
restrict default kod nomodify notrap nopeer noquery

# Permit all access over the loopback interface. This could
# be tightened as well, but to do so would effect some of
# the administrative functions.
restrict 127.0.0.1

# Hosts on local network are less restricted.
#restrict 192.168.1.0 mask 255.255.255.0 nomodify notrap

# Use public servers from the pool.ntp.org project.
# Please consider joining the pool (http://www.pool.ntp.org/join.html).

#broadcast 192.168.1.255 key 42 # broadcast server
#broadcastclient # broadcast client
#broadcast 224.0.1.1 key 42 # multicast server
#multicastclient 224.0.1.1 # multicast client
#manycastserver 239.255.254.254 # manycast server
#manycastclient 239.255.254.254 key 42 # manycast client

# Undisciplined Local Clock. This is a fake driver intended for backup
# and when no outside source of synchronized time is available.
server 127.127.1.0
fudge 127.127.1.0 stratum 10

# Drift file. Put this in a directory which the daemon can write to.
# No symbolic links allowed, either, since the daemon updates the file
# by creating a temporary in the same directory and then rename()'ing
# it to the file.
driftfile /var/lib/ntp/drift

# Key file containing the keys and key identifiers used when operating
# with symmetric key cryptography.
keys /etc/ntp/keys

# Specify the key identifiers which are trusted.
#trustedkey 4 8 42

# Specify the key identifier to use with the ntpdc utility.
#requestkey 8

# Specify the key identifier to use with the ntpq utility.
#controlkey 8
server <myDomainController>
restrict <myDomainController> mask 255.255.255.255 nomodify notrap noquery

Regards,