Nagios Support Forum

Greetings:

Let me preface this post by saying that I am extremely new to Nagios XI (only a handful of hours into the interface), so please bear with me... We have a monitored host (Windows Server), along with some monitored services (CPU, Disk, and Mem). What I am looking to do is change the alert thresholds so that when it goes from 'Green/Ok' to 'Warning' we will get an email alert.

Do I change this in Service Management > Alert Settings > Notification Options?

I would imagine I am not providing a lot of critical information to this community, so let me know how I can advise on getting the right details to make an informed decision.

Thanks in advance!

Hi Brandont,

It sounds like you are in the right place! The Notification Preferences page under the Notification Options nav header should be what you are looking for. Turning on the email flag for "Service Warning" and/or "Service Critical" will send an email to the account you have specified on the Account Information page when a service reaches that status.

When setting up a new service/host to monitor, you will be able to specify how many times XI will perform this check before notifying a human user, so if you DO want to receive a notification whenever this occurs, make sure to lower the default threshold (usually 5 times for most wizards) to 1, if that is the level of granularity you want. Note that these notification settings are per user, so you can designate specific team members to receive different notification levels.

Hopefully this addresses your questions but please let us know if you need any more relevant information!

Thanks for the input. I attached a pic of the service Alert Settings for this server object. Is this where I would change this option?

I do have some follow-up questions on what I am seeing within the Alert Settings of this service:

Service Management > Alert Settings

Notification enabled is set to 'Skip.' Why is not 'On?' The only thing I can think of is the service is inheriting the settings from the host template, however, the host template notification is also skip. What am I missing here?

Service Management > Common Settings: How do I read the argument below?

-t 'kHn1YByIFzlQfjnb9HxZFQmTN' -P 5693 -M 'disk/logical/C:|' -w '85' -c '90'

If I am looking at this correctly, the -W is 'warning' and -C is 'critical' so if the disk reaches 85% usage it goes into warning, and it is flagged as critical when it hits 90%?

You're correct, services inherit this setting from the host template. Note that "Skip" means "use template value", not "Off." Skip would basically mean that the service would follow it's dependency chain and use whatever notification is set by whatever the parent template refers to. You can see this under this service's "Common Settings" tab -> "Manage Templates", which will show you the template this service uses. That service may also be set to skip, but refer to another lower level service. There is often a chain that will refer back to a service that will likely have notifications set to "On."

The argument below is using the "-t" parameter for the NCPA token value, the "-P" param for the port that the Windows Server will output NCPA data to, and then the "-M" parameter is the name of the service you are monitoring on the windows server. Your read on the -w and -c is correct.

Hey @brandont:

Hopefully the sage advice of @jsimon got you sorted out. Let us know if you are still having difficulties with this.

This might be helpful, if you haven't already had a chance to review it already: https://assets.nagios.com/downloads/nag ... ios-XI.pdf

Phred

To change the alert thresholds for a monitored disk in Nagios XI, you should log in to the Nagios XI interface and navigate to Configure > Core Config Manager. In the Core Config Manager, select Services, find the service associated with the disk,Retro Bowl College and adjust the warning and critical thresholds under Alert Settings. Save and apply the configuration to ensure the changes take effect.

Here, you can set the thresholds for when you want to receive alerts. You’ll want to ensure that the notification for 'Warning' status is enabled. papa's games

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

If you're trying to change the alert threshold on a monitored disk, make sure you're aware of the default settings and how they impact your monitoring system. Adjusting the threshold can help reduce unnecessary alerts or ensure you catch critical issues early. Always document your changes and monitor the effects closely after applying them. This can be especially useful in production environments where disk space issues can lead to performance degradation or outages. Test changes in a staging environment if possible. nulls brawl

danisa wrote: ↑Mon Jun 30, 2025 9:31 pm 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.
Nulls Brawl

Yes, I see that the notification behavior is handled in Service Management > Alert Settings > Notification Options, but since the thresholds are actually defined in the check command or plugin arguments, is there a way to adjust them directly from the UI instead of editing the check definition?