Comment 1 for bug 1881880

Hi and thanks for taking the time to file this bug. What you describe is pretty strange, as according to the changelog the update from monitoring-plugins 2.2-3ubuntu2 to 2.2-3ubuntu3 only involves a fix on the check_http plugin. The check_ntp_* plugins were not touched.

I think it's worth double checking the problem actually comes from monitoring-plugins. Could you try to downgrade the package, like this:

  apt install monitoring-plugins-basic=2.2-3ubuntu2

and check if the problem goes away?

I can't reproduce the problem with:

  /usr/lib/nagios/plugins/check_ntp_time -H pool.ntp.org -v

but the queried servers are probably not sending KoD packets.

I'm setting the status of this report to Incomplete for the moment. Please change it back to New after commenting back and we'll look at it again. Thanks!