Nagios Support Forum

Hello everyone.

I was wondering if someone could help me out with something.

I recently install nagios core 4. I added a service for check ntp time. Although the command against some servers returns a result

root@gnagios:~# /usr/local/nagios/libexec/check_ntp_time -H "hostname" -w ~0.4:0.4 -c ~0.5:0.5
NTP OK: Offset -0.0006108283997 secs|offset=-0.000611s;0.400000;0.500000;

the same command against other hosts returns No response from NTP server

So far i could find why. The servers are windows 2003/2008 and part of a domain and all are on the same group policy ou. Is there a specific setting/role/feature that must be installed or enabled on the windows servers?

Thanks for your time

I'm neither a Windows admin nor a NTP guru, but a quick Google search revealed the following:

http://social.technet.microsoft.com/For ... nserverNIS

Also make sure to check the firewall settings both on the Windows server and any in-between firewalls that may be in place.

Thanks tmcdonald,
I think that I have to install the NTP server feature to the server in order to get a response back. This is at least what I understood from searching.

Correct. No NTP server installed means that there is no NTP server to query to see if it's running or if it's running too far ahead/behind its source clock.

If you're not running NTP server on a box, there is no reason to install it just to monitor it. An NTP client or Windows Time client will sync from an NTP server and maintain time, so you generally don't need to monitor to see that the time is correct on a client.

john.ts, did eloyd answer your question?

lmiltchev sorry for the delay.

Yes I believe eloyd's answer is suitable.

Thanks a lot guys