I’ve upgraded my Icinga machine some minutes ago from Debian Stretch to Buster (incl. Icinga2 upgrade to latest version). Since then some checks for Windows machines via check_nrpe fail with “CHECK_NRPE: (ssl_err != 5) Error - Could not complete SSL handshake with XXX.XXX.XXX.X: 1”
Log shows:
2020 Jul 17 17:55:06 icinga Client TLS handshake failed (to [XXX.XXX.XXX.XXX]:5665): sslv3 alert handshake failure
Corresponding call was:
'/usr/lib/nagios/plugins/check_nrpe' '-2' '-H' 'HOSTNAME.DOMAIN.TLD' '-c' 'CheckFileAge' '-a' '/path:"C:\\FOLDER\\SUBFOLDER" /namefilter:"FILENAME.log" /searchdepth:1 /age:10n /warning:1: /critical:1:'
There are only some Windows machines affected. Those who are affected have an older version of Windows running. Those Windows Server with more recent Windows Versions aren’t affected.
I already updated Icinga agent to latest version as well as NSClient++.
I also double checked, that nsclient.ini still has Icinga Server IP in “allowed hosts” and insecure is allowed.
Any ideas how to fix that?
Best
Daniel
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