The \ characters in the service status could be tripping some things up. Do the notifications you're experiencing problems with all related to Windows disk checks? Depending on the underlying notification command you have defined, this un-escaped character could be causing issues when the command fu...

Would authentication be possible using the indicated Apache mod? Maybe? I don't know your SAML provider :) if yes, how? We don't know how perform the configuration for use this Apache mod. Likely by marrying-up the GitHub instructions for configuration to the Apache configs generated for Nagios Cor...

check_wmi_plus has a concept of custom modules that can churn generic WMI queries into Nagios parse-able results. There's some sparse documentation on this:
https://edcint.co.nz/checkwmiplus/ini-f ... mentation/

This post may be useful to you:
viewtopic.php?f=7&t=52622&p=275945#p275945

The \r implies there may have been some copying+pasting or general file transfer between a Unix and Windows machine that junked-up the line endings. More info: http://www.cs.toronto.edu/~krueger/csc209h/tut/line-endings.html I'd double-check your file to make sure it's not being run on a Unix system...

Which plugin are you using? Can you provide a link or reference to the specific code being executed? Simply put, your Perl runtime is looking for a dependency that doesn't exist. Install that dependency via cpan/yum. yum install perl-REST-Client If that doesn't work, please share the output of the a...

This can be done. An agent like NCPA or NSClient++ could handle the "hop" you're describing. Essentially you'd have Nagios Core communicate with that agent (via one of the agent's associated plugins like check_ncpa or check_nrpe) to handle the PowerShell execution. Rather than having Nagio...

What's the exact query you're running? Documentation around those results is a bit sparse. For service/host status mappings, those can be found here: https://github.com/NagiosEnterprises/nagioscore/blob/345fd4e8257085ce7f3806ee4fb04008919f24e5/include/statusdata.h#L143-L159 Many of those fields, lik...

It has been discussed multiple times in the past that those reporting CGIs are getting major refactors with Nagios Core 5 (performance issues being well known), though I don't see that on the roadmap anywhere currently: https://www.nagios.com/roadmaps/ Relevant GitHub issues: https://github.com/Nagi...

Nagios checks results are retrieved either actively or passively . Active checks are tied to some specific command/plugin execution. Passive checks are not. So yes, you could perform WMI monitoring without a specific "plugin" passively. You can leverage an agent like NCPA or NSClient++ to ...