Nagios Support Forum

What version of Core are you using? The latest is 4.2.1, despite 4.2.0 mentioned in https://assets.nagios.com/downloads/nag ... Source.pdf

Did you install from source? On what OS are you running Nagios Core?

Version 4.2.1
I think the rest don't have anything to do with Nagios features.

Whether you install from source or not will determine where files are located. The same is true of the OS. You are correct in that it is probably not pertinent to your issue, but sometimes these things turn into rabbit holes.

You can exclude hosts with the ! as you can see at https://assets.nagios.com/downloads/nag ... ricks.html. I was unable to find reference to excluding a contact group with a !.

You can add contact groups with the + as you can see at https://assets.nagios.com/downloads/nag ... tance.html.

You said "Yes, exactly" in reference to the issue being resolved, but then asked a question. Was the question just for informational purposes or are you still experiencing an issue?

So +/- are working and with contact groups then.

Thank you


Off topic:
"Yes, exactly" with the above = I have solved the solution.
Then I asked a new relevant question, trying to improve the prior solution.

amprantino wrote:So +/- are working and with contact groups then.

I could not find any reference to the "-", only to the "+".

Also no reference to the !
So only a test will enlighten us

github is down (presumably the wide-spread DNS issue), so I can't point you to a public link, but the following suggests the ! should work:
If it is not working, you can file a bug report at https://github.com/NagiosEnterprises/nagioscore (you know, once github is back up)

Ok, here's the file in question: https://github.com/NagiosEnterprises/na ... template.c