Network Monitoring

Monitor Your Networks, Servers, Routers, And Firewalls.

Nagios XI is an enterprise-class network monitoring and alerting solution that provides organizations with extended insight of their IT infrastructure before problems affect critical business processes.

30-day free trial. Full enterprise features. No credit card required.

Trusted by 10K+ Organizations Worldwide

The Network Monitoring Platform IT Teams Have Trusted Since 1999.

We’ve seen it all, from routers, switches, and firewalls to servers, VMs, containers, and Kubernetes. Nagios XI helps sysadmins and network operation teams adapt to the ever-changing technological landscape.

Service Status Detail

39d 7h 37m 39Ss

sysDescr.0

SNMP OK - USW-Pro-Aggregation, X.X.X.XXX.XXXXX

Host Status

500

OK

32

CRITICAL

Server Statistics

Metric Value

Load

1-min

0.56

5-min

0.38

15-min

0.33

Last Updated: 2026-03-27 11:16:33

CPU Stats

User

1.05%

System

0.80%

I/O Wait

0.30%

Idle

97.69%

Last Updated: 2026-03-27 11:16:33

Memory

Total

3745 MB

Used

2213 MB

Free

500 MB

Cached

1531 MB

Last Updated: 2026-03-27 11:16:33

Swap

Total

4131 MB

Used

136 MB

Free

3995 MB

Last Updated: 2026-03-27 11:16:33

SNMP Monitoring

Nagios XI provides comprehensive SNMP monitoring for any SNMP-enabled device with built-in MIB support, customizable thresholds, and advanced trap management for real-time alerting.

Network Monitoring

Track the health and performance of your routers, switches, firewalls and more. You get bandwidth utilization, capacity planning, interface errors, and uptime data across your network.

Windows Monitoring

Monitor Windows servers and workstations without extra overhead. Nagios XI tracks CPU, memory, disk, services, event logs, and performance counters.

Physical & Virtual Server Monitoring

Nagios XI keeps your servers healthy around the clock. Monitor physical and virtual servers for CPU load, memory usage, disk capacity, and running processes.

Linux Monitoring

Monitor Linux servers, processes, and services across every major distribution. Deploy the NCPA agent for deep visibility into CPU, memory, disk, and running processes on any Linux host you manage.

Application Monitoring

Nagios XI checks availability, response time, and performance for web apps, databases, mail servers, and custom services. Detect application failures, errors, and performance issues.

LAN & WAN Monitoring

Monitor and visualize your local and wide area networks. Nagios XI helps you track and troubleshoot latency, packet loss, performance, and link availability across every site you manage.

Container Monitoring

Monitor your Docker/K8 containers alongside traditional infrastructure. Nagios XI makes it easy to set up and track running containers, CPU usage, memory consumption, and container health.

SSL Certificate Monitoring

Nagios XI helps network operation teams monitor and validate certificate chains and receive configurable expiration warnings to prevent certificate-related business outages.

End-to-End Network Monitoring Made Simple

Full Visibility

Complete Oversight
Across Every Environment

Monitor routers, switches, firewalls, servers, VMs, containers, and storage with profound visibility across on-prem, cloud, and hybrid environments—supported by customizable NOC dashboards built for sysadmins and network operations teams.

Network Topology

See How Everything Connects

Map out real-time visualizations of your hosts, showing parent-child relationships and connection status. Switch between multiple layouts—like horizontal tree and circular views—to get a clear, complete picture of your network topology.

Nagios XI Business Process Intelligence

Alerts & Notifications

Never Miss a Critical Alert

Detects issues as they happen and alerts the right people instantly via email, SMS, or custom integrations like Slack, ServiceNow, and Jira. Set escalation rules, customize templates, and automate remediation so your team can respond quickly and stay focused.

Email

Get notified instantly when a host or service alert is triggered.

Custom Integrations

Configure and push alerts directly into your team's preferred channels like ServiceNow, Slack and Jira.

SMS

Routes alerts via email-to-SMS gateways to any mobile carrier.

Auto-Remediation

Automatically execute scripts or trigger Ansible playbooks to remediate issues the moment an alert fires.

SNMP Traps

Send SNMP trap notifications directly to your network management system on alert.

WebHooks

Fire custom HTTP callbacks to any third-party URL on alert.

Capacity Planning

See Tomorrow's Problems Today

Project future resource usage based on historical performance data. Identify bottlenecks before they impact your network and allocate resources before problems arise.

SLA Reporting

Prove Uptime.
Report with Confidence.

Generate SLA reports in seconds. Give IT teams and stakeholders clear, data-backed visibility into service availability and meet compliance requirements without the manual work.

SLA Report

SLA Target: 95.000%

Report covers from: 2024-07-22 21:40:17 to 2024-07-23 21:40:17

Host Uptime SLA Status

Cisco Switch - Core99.821%

PASSED

Windows Server - AD100.000%

PASSED

Ansible Server100.000%

PASSED

Linux Server - Production97.430%

WARNING

Firewall - Edge Gateway93.100%

FAILED

Perpetual License Pricing

The Right Network Monitoring Tool Can Make All The Difference

Pick the edition that fits your monitoring environment requirements.

Standard

$2,595

Perpetual license – starts at 100 nodes

For small to medium teams that want to start monitoring.

Advanced Dashboard Deployment
Custom Host & Service Actions
Business Process Intelligence
Custom Views & Dashboards
Enhanced Configuration GUI
Remote Passive Monitoring
Executive Summary Report
Bandwidth Usage Report
Instant Remote Access
Configuraton Rollback
Custom Action URLs
Escalation Wizard
Emailed Reports

No credit card required

Get Started Free View full pricing details →

Enterprise

Most popular

$4,690

Perpetual license – starts at 100 nodes

Everything in Standard, plus advanced reporting, capacity planning, and more.

Everything in Standard plus:

Advanced Business Process Monitoring
Service-Level Agreements Reports
Scheduled Reports & Pages
Bulk Notification Settings
Bulk Modification Tool
SNMP Trap Interface
Bulk Renaming Tool
Deadpool Settings
Capacity Planning
Audit Log

No credit card required

Get Started Free View full pricing details →

Sitewide

Large-scale

Custom

Contact sales for volume pricing

Unlimited node monitoring across multiple instances for large or distributed environments.

Everything in Enterprise plus:

Deploy Multiple unlimited-node instances
Site-wide license across all locations
Dedicated account manager
Enterprise SLA guarantees
Custom training programs
Priority support

Contact sales View full pricing details →

For large organizations

Mission-Critical Enterprise Network Monitoring

Nagios XI supports multiple monitoring architectures for large and distributed environments. Choose the model that fits how your network is built.

Central NOC

Centralized Monitoring

Simplify configuration, notifications, and reporting with a single central Nagios XI server—monitor public services and remote servers, even behind firewalls, from your NOC.

Passive agents allow monitoring of otherwise inaccessible network servers
Central monitoring system can be configured with multi-tenancy features
Some administrative tasks limited to central NOC staff
Centralized management, notifications, and reporting

Distributed Networks

Federated Monitoring

Multiple remote Nagios servers monitor distributed networks locally, while sending status data back to a central NOC system. This gives organizations both deep, onsite monitoring capabilities and a unified, high-level view across all environments.

Distributed monitoring and reporting
Custom notifications for NOC teams
Powerful onsite monitoring servers
Admin access for local staff

High-Performance Scale

Scale Your Network Monitoring
With Load Balancing

Nagios Mod-Gearman allows you to distribute checks across worker servers to reduce load on your central Nagios server, balance workloads, and maintain centralized alerts.

Local checks with centralized alerts and visibility
Reduced server load with built-in load balancing
Scale with additional workers for more checks or segments
No inbound access required for remote sites

Available as a Premium feature as of Nagios XI 2024R2.1 and above.

NAGIOS FUSION

All Your Nagios Servers,
One Single Pane of Glass.

Nagios Fusion gives you a single pane of glass for your entire IT infrastructure—see real-time status, alerts, and reports from Nagios XI, Log Server, and Network Analyzer, all in one unified view.

Why IT Teams Choose Nagios XI For Network Monitoring

Over a million Nagios deployments don’t happen by accident.

Complete Data Sovereignty

Full control of your operational data with on-premise deployment. No cloud, no vendor access to your sensitive data.

Predictable Perpetual Pricing

Choose what you need. One-time licensing that scales with your infrastructure, with optional annual Maintenance & Support Plans available.

Endless Customizability

Highly customizable network monitoring with 5,000+ (and growing) plugins, add-ons, and integrations via the Nagios Exchange.

Testimonials

Don't Just Take Our Word For It

Real feedback from IT professionals who’ve been in your shoes.

Banking

The manual work of extracting information has been automated with help from Nagios XI, giving them back hours of free time each week.

AC

Alfred Chong

Director, Astiostech

Read case study

Fixed Wireless ISP

We have been able to work with Nagios to determine our best possible interfaces and workflows to make our monitoring system work with us instead of against us. The flexibility and expandability of Nagios are second to none.

AK

Adam Kennedy

Network and Systems Engineering, Watch Communications

Read case study

Insurance

There's a small learning curve with Nagios, and then you can do things you could never do with another solution. Nagios is the framework that allows you to design or build whatever you want because the customization is best in the world.

IA

Infrastructure Architect

Multi-National Insurance Underwriter

Read case study

Higher Education

The ease of administration and great price drove us to Nagios. Paying a little for XI was well worth it; it has paid for itself time and time again in saved time and better service delivery.

JM

Jason Moldan

System Administrator, University of St. Thomas

Read case study

Capital Markets

We can observe all these platforms, including services, in one IT environment. We are alerted to things that we can fix and address before they become big problems. We can even know what's coming next. If we can monitor it, we can control it.

FS

Fadi Sodah

Director of ICT, Amman Stock Exchange

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Energy & Utilities

The efficiency and proactivity levels of our resources were raised. Nagios centralized monitoring provided an excellent panoramic view, and our troubleshooting time decreased. The valuable and precise information was presented in well-organized reports.

MA

Marco Aponte

CEO, E-Services S.R.L.

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Start Monitoring Today

Network Monitoring Built For The Long Haul

See why Nagios XI has been trusted by IT teams for over two decades.

Free 30-day trial. Full enterprise features. No credit card required.