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Nagios Core

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Nagios Core is the industry standard, Open Source IT monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

Nagios Core serves as one of the foundation blocks of Nagios XI - our commercial monitoring solution.

Nagios Core allows you to monitor your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a failure, it can alert technical staff of the problem, allowing them to begin remediation processes before outages affect business processes, end-users, or customers.

Nagios Core Overview

Nagios Core provides organizations with many benefits, including:

  • Comprehensive Monitoring: Provides monitoring of all mission-critical infrastructure components - including applications, services, operating systems, network protocols, system metrics, and network infrastructure.

  • Visibility: Provides central view of your entire IT operations network and business processes.

  • Awareness: Alerts are delivered to IT staff via email and SMS. Multi-user notification escalation capabilities ensure alerts reach the attention of the right people.

  • Problem Remediation: Event handlers allow you to automatically restart failed applications, services, servers, and devices when problems are detected.

  • Reports: Ensure SLAs are being met, provides historical records of outages, notifications, and alert response for later analysis.

  • Extendable Architecture: Provides easy integration with in-house and third-party applications. Hundreds of community-developed addons extend core functionality.


Nagios Core is available free of charge to organizations that do not require professional support services. For organizations that prefer or are required to obtain professional support, commercial support plans are available starting at $2,495 USD per year. Learn more.


Nagios Core can be downloaded from

More Information


Visit the Nagios Core project website. Learn more.


Discover what Nagios Core can do for you and learn how it works. Learn more.


Information on Nagios Core features and capabilities. Learn more.