About Icinga

One turbo-charged open source monitoring project

What is Icinga?

Icinga is a monitoring software project that began as a fork of Nagios. The Icinga Project maintains two branches in parallel:

Icinga 2

Monitoring redesigned Free from the constraints of a fork, Icinga 2 builds on the success of Icinga 1 to be faster, easier to configure, extend and scale. Icinga 2 is backward compatible to Icinga 1 / Nagios plugins and addons.

Icinga 1

Monitoring fork of Nagios   The original fork of Nagios is backward compatible – all Nagios configurations, plugins and addons can be used with Icinga 1. Icinga 1 retains the features of its predecessor and adds many patches and features requested by the user community.

What can you do with both?


Network services

Host resources
CPU load, disk utilization, system logs…

Server components
Switches, routers, temperature and humidity sensors…



On any channel: Email, SMS, phone call.. Escalate alerts to other users or channels Fine tune to recognise dependencies between hosts & services



Chart graphs with PNP4Nagios or Graphite Measure SLA with detailed availability reports Identify trends before users see problems

Build your own Icinga monitoring system

Icinga 1 and Icinga 2 are modular in architecture. Tack on a user interface, generate reports or connect your smartphone.


Icinga 2
Redesigned monitoring system – faster, easier to configure, extend and scale. Learn more…
Icinga 1
Original monitoring fork of Nagios (includes Icinga Classic user interface). Learn more…


Icinga Web 2
Our 2nd generation monitoring interface. Learn more…
Icinga Web
Our original dynamic monitoring interface. Learn more…
Icinga Reports
Our SLA reporting addon. Learn more…
Monitoring Plugins
3rd party scripts that check your hosts or services, and return results to the Icinga instance.
Monitoring Addons
3rd party tools to extend Icinga functionality e.g. performance graphing, network visualisation, configuration management, etc.