NagMon1 · Start Here
Getting Started with NagMon
From install to first live data: what you need on the Nagios side, trying the built-in demo server, connecting your first server, and a quick tour of the tabs.
Read the guide →NagMon User Guide
Written against NagMon 2.0.1. Start at Getting Started if you're new; jump straight to Troubleshooting if something isn't connecting.
2 · Servers
Adding & Managing Servers
Server details, custom ports, Basic and Digest authentication, HTTPS and self-signed certificates — and how monitoring multiple Nagios servers at once works.
Read the guide →3 · Dashboard
The Dashboard
Reading the status summary, spotting current problems at a glance, per-server connection warnings, and how the shared refresh cycle keeps every tab current.
Read the guide →4 · Monitoring
Hosts, Services & Host Groups
Status filters, sorting by name, severity, or state duration, grouping by host group, host icons, and the host and service detail views.
Read the guide →5 · Responding
Alerts & Outages
Where alerts come from, filtering and sorting them, reading an alert entry, and how the outages view differs from the alert history.
Read the guide →6 · Actions
Acknowledge, Downtime & More
Acknowledging problems, scheduling downtime, rechecking, and toggling notifications straight from your phone — plus the permissions Nagios needs to accept commands.
Read the guide →7 · Settings
Settings & Personalization
Appearance and language options, server management, and where to rate the app, reach support, or submit a feature request.
Read the guide →8 · Help
Troubleshooting & FAQ
The "unable to connect" checklist, authentication problems, missing host groups or icons, commands not reaching the server, and how to report a bug.
Read the guide →9 · Release Notes
What's New in NagMon 2.0.1
Multi-server monitoring, custom ports, sorting, host groups, host icons, action and notes links, command reliability fixes, and a refreshed design.
Read the guide →Nagios Guides
Practical guides for anyone running Nagios Core — no app required.
Mobile Monitoring
How to Monitor Nagios From Your iPhone
Every way to check Nagios from a phone — the mobile web UI, VPN tricks, and native apps — plus a step-by-step setup for live host and service status in your pocket.
Read the guide →API Reference
The Nagios JSON API: statusjson.cgi Explained
Nagios Core ships a built-in JSON API. Learn the statusjson.cgi, objectjson.cgi, and archivejson.cgi endpoints with copy-paste curl examples — and a live demo server to test against.
Read the guide →Alerting
Nagios Email Notifications: Setup, Tuning & Troubleshooting
Email is still how Nagios tells you something broke. Configure contacts and notification commands correctly, cut the noise down to alerts that matter, and fix the classic "Nagios isn't sending emails" problems.
Read the guide →Security
Secure Remote Access to Your Nagios Server
Reach your Nagios web interface from anywhere without exposing your infrastructure: HTTPS with Let's Encrypt, reverse proxies, VPNs, read-only accounts, and a hardening checklist.
Read the guide →Fundamentals
Nagios Host and Service States Explained
UP, DOWN, UNREACHABLE, OK, WARNING, CRITICAL, UNKNOWN — plus soft vs. hard states, acknowledgements, downtime, and flapping. The reference you'll wish you'd read on day one.
Read the guide →About NagMon
NagMon — Nagios Client for iOS
An alternative interface to the Nagios web UI, tailored to iOS — much faster, with live host and service status, advanced filtering, and multiple server support. No ads, no analytics, no tracking.
Learn more →