Nagios | Enterprise IT Infrastructure Monitoring

The Open Source Standard in IT Infrastructure Monitoring

Get Started with Nagios

IT Management with Nagios

Nagios is a powerful IT management system and IT monitoring software suite that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

Nagios XI

Enterprise Infrastructure Monitoring & Alerting Platform

Monitor and manage your entire IT infrastructure with Nagios XI®. Get real-time alerts for servers, networks, and IoT devices with perpetual license pricing—no hidden costs.

Nagios XI Features

Customizable Dashboards & Views

Create personalized tactical displays using a variety of built-in dashlets — graphs, status summaries, gauges, maps, and more. Schedule rotating dashboard views, deploy custom dashboards to other users, and access any monitored device instantly via RDP, VNC, Telnet, or SSH directly from your dashboard.

Event-Driven Remediation & Alerting

Automatically run remediation scripts the moment problems are detected, so issues get resolved before they escalate. Custom host and service actions let administrators define ready-to-run commands for troubleshooting, ticket creation, and more — while escalation policies and multi-channel notifications ensure the right people are always in the loop.

On-Premises Control & Access Management

Keep configurations clean and compliant with configuration rollback, bulk modification tools, and deadpool settings that automatically remove stale monitoring entries. Administrators can deploy notification settings at scale, rename hosts and services without losing historical data, and maintain a full audit trail of every change made across the system.

Capacity Planning and SLA Reporting

Visualize projected future performance and get ahead of upgrade requirements before bottlenecks affect users. Track service performance against SLA commitments with detailed availability reports, scheduled report delivery, and executive summary dashboards designed to give management at-a-glance visibility into alerts, uptime, and activity.

Nagios Log Server

Centralized Log Management & Server Log Analysis

Nagios Log Server provides real-time log analysis, custom dashboards, and high-performance storage with perpetual licensing and no per-GB fees.

Nagios Log Server Features

Log Collection & Intelligence

Centralized Log Management, Built For Scale

Aggregate every source. Syslog, Windows Event Logs, flat files, and application logs from servers, network devices, and cloud platforms in one repository.

Search in plain English. The AI Query Assistant turns natural-language prompts into Lucene queries, so anyone can search logs.
Process logs in real time. OpenSearch-based indexing surfaces threats and performance issues as events arrive.
Speak every protocol. Native support for syslog (TCP/UDP/TLS), JSON, and custom formats with extensible parsing.
Skip the parser-writing. Built-in parsers handle common formats, with custom field extraction when you need it.
Keep history searchable. Configurable retention, compression, and automatic archiving for compliance and forensics.

Visualization & Alerting

Turn Log Noise Into Actionable Insight

Build dashboards for every team. Role-based views with dashlets, charts, and live log streams.

Alert on what matters. Trigger on log patterns, error conditions, or thresholds, with automated escalation.
Start with templates. Default dashboards and a community library get you running on day one.
Route notifications anywhere. Email, SNMP traps, or Nagios XI for SMS and third-party integrations.
Correlate across sources. Build queries that join data from different systems to surface threats early.
Feed metrics into Nagios XI. Turn log data into passive checks for capacity planning and SLA tracking.

Compliance & Security

Built To Support Your Compliance Program

Centralized logging is the backbone of nearly every compliance framework. Log Server gives you the controls, retention, and evidence trail to support your program.

Prove compliance with every framework. Scheduled, exportable reports for PCI DSS, HIPAA, SOX, GDPR, and FISMA audits.
Meet log retention mandates. Configurable retention and automatic archiving keep historical logs intact as long as regulators require.
Produce audit-ready evidence on demand. Forensic search, field extraction, and timeline reconstruction answer auditor questions fast.
Enforce least-privilege access. Role-based, multi-tenant permissions control who can view, search, or export each log source.
Protect log integrity in transit. TLS-encrypted syslog satisfies data-in-motion controls under PCI DSS and HIPAA.
Maintain a complete chain of custody. Every user action, config change, and export is logged for a defensible audit trail.

Nagios Network Analyzer

NetFlow Analysis & Bandwidth Monitoring

Analyze traffic flows, monitor bandwidth usage, identify top talkers, and troubleshoot network performance with integrated packet inspection, alerting, and network discovery tools.

Nagios Network Analyzer Features

Comprehensive Dashboards

Powerful, customizable dashboards enable each user to create crisp visualizations showing traffic and top talkers on the sources that are most important to them, along with high-level scheduled Nmap scan data.

Advanced Traffic Analysis

Analyze flow data, monitor bandwidth usage, inspect packets, and drill into traffic patterns from a single interface. See which hosts, applications, and conversations are consuming network resources so your team can resolve congestion and performance issues faster.

Automated Alert System

Receive alerts when query-based flow events, Suricata Signature IDs, or open/closed ports in Nmap scans match defined criteria. Email notifications directly, forward results to Nagios, or send an SNMP trap when problems are detected.

Monitoring Server Integration

Seamlessly integrate with Nagios XI for centralized visibility of alerts from both solutions. Create checks within Network Analyzer to send results upstream to XI, or run the Network Analyzer Wizard in XI to actively monitor source or source group traffic.

Nagios Fusion

Centralized Monitoring

Monitor your entire Nagios ecosystem from a single pane of glass and manage your environment with clarity and efficiency.

Nagios Fusion Features

Comprehensive Nagios Integration

Unify status and performance data from Nagios XI, Core, Log Server, and Network Analyzer to gain complete visibility into your IT infrastructure from a single interface.

Unified, At-a-Glance Visibility

Quickly identify outages, performance issues, and critical alerts across remote servers and distributed environments, enabling faster troubleshooting and response.

Decentralized Monitoring, Centralized Oversight

Allow geographically separated teams to manage their own Nagios instances while central operations teams maintain full visibility and control across all servers.

Distributed Monitoring and Scalability

Distribute monitoring across complex and geographically dispersed infrastructures to scale efficiently without sacrificing global visibility.