Nagios Addons

The main difference between a NagiosPlugin and an NagiosAddon is Nagios addons are an extensions to the base-system monitoring on the server. There are two types of Nagios Addons available.

  • Core-Addons (Addons provided by the Nagios-Developer Ethan Galstad)
  • Community-Addons(Addons provied by the Nagios-Community)

Nagios Core Addons


NDOUtils allows you to export current and historical data from one or more Nagios instances to a MySQL database. Several community addons use this as one of their data sources.


Passive Service Checks


On of the features of Nagios is that is can process service check results that are submitted by external applications. Service checks which are performed and submitted to Nagios by external apps are called passive checks. Passive checks can be contrasted with active checks, which are service checks that have been initiated by Nagios.

Why The Need For Passive Checks?

Passive checks are useful for monitoring services that are:

  • located behind a firewall, and can therefore not be checked actively from the host running Nagios
  • asynchronous in nature and can therefore not be actively checked in a reliable manner (e.g. SNMP traps, security alerts, etc.)

How Do Passive Checks Work?


Fedora Core 14 - "Sane Backends" intefering with FC14 Software Update

Running the Update Software utility from Fedora Core 14 was giving me some conflicts and error messages related to Sane Backends which has to do with scanning, digital cameras etc.

This looks to be Red Hat Bugzilla - 749083. The error messages look like

"Transaction error: could not add package update for

The fix is easy


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