What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

How to confirm servers running NTP clients are staying in sync with NTP server?



I have a group of servers that are synchronized via NTP. One server is running an NTP server and I was able to install the SNTP/NTP sensor to monitor it. The other servers in this group use NTP clients to sync to the server running the NTP server but I can't figure out a way to add sensors to confirm the clients are staying in sync. Normally this shouldn't be an issue but we've had cases where the NTP clients have been set to the wrong IP address or the IP address has changed so even though the NTP clients are running, the time isn't staying in sync. It would be great if there was a simple way for PRTG to check this (without resorting to a custom VBScript). Any suggestions?

ntp sntp time

Created on Jan 31, 2012 1:26:01 PM

4 Replies




are these Windows based servers? If so you could look into the Custom Sensor "Demo VBScript - UTCTime via WMI.vbs" that comes with PRTG. It will display the UTC-Time of the target, as string though.

best regards.

Created on Jan 31, 2012 5:47:45 PM by  Torsten Lindner [Paessler Support]



Yes, they are Windows based servers. Thanks for pointing me to the script! Unless anyone else has a simpler idea, it looks my best bet is to update the script to take a difference of the two times and return it. I'm not sure if we care enough to implement this but if I do end up doing it I'll try to remember to update this thread with the script.

Created on Feb 1, 2012 3:52:09 PM



Is this possible with Linux?

Created on Apr 17, 2014 4:23:10 PM



for Linux Server you might have a look at the SSH Script Sensors of PRTG.
Best regards

Created on Apr 18, 2014 1:36:11 PM by  Konstantin Wolff [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.