Nagios Support Forum

Yes, the notification behavior is controlled in part by Service Management > Alert Settings > Notification Options, but the actual thresholds for warning/critical states are typically set in the command or check plugin arguments — not in the Notification Options panel.
Eaglercraft

NagiosQL – Web-based configuration tool for Nagios Core.
Allows role-based access.
Technicians can add/remove hosts and services without editing .cfg files
Escape Road

Make sure the API key you're using has sufficient permissions.
In Nagios XI, go to Admin > Manage Users.
Check the user associated with the API key — do they have full admin rights?
Some endpoints require elevated permissions and may return null or nothing for limited accounts.

Worldguessr

On the test system, you went through an intermediary step with NDO2DB 2.1.4 before switching to NDO3 and likely had some components freshly compiled. Paper io

NCPA is often favored these days because it’s more secure out-of-the-box and Football Bros exposes more Windows-specific metrics without custom OIDs.

Nagios relies on plugins for almost everything, and the base install doesn't auto-discover or template SNMP devices like some alternatives. But once you get used to the modularity, it’s very flexible.
Sprunki Incredibox

Nagios XI uses the Nagios Core custom contact variables (_CUSTOMVARIABLES) which have a character limit of 256 characters by default. Any variable exceeding this length will be silently truncated when stored in the database. Football Bros