Network Monitoring

Routers and switches: Nagios polls routers and switches via SNMP to track availability, interface status, CPU load, and error rates. When a device goes down or an interface flaps, your team gets alerted before users start calling.

Bandwidth utilization: Track inbound and outbound traffic on every interface. Nagios Network Analyzer provides NetFlow-based bandwidth monitoring with historical trending, so you can identify which hosts, applications, or protocols are consuming the most capacity — and spot saturation before it affects performance.

Network services and protocols: Nagios monitors the availability and response time of the services your network depends on: DNS, DHCP, HTTP, HTTPS, FTP, SMTP, SNMP, SSH, and more. If a service stops responding or exceeds its response threshold, Nagios triggers an alert.

SNMP traps: Beyond active polling, Nagios receives and processes SNMP traps from network devices — giving you immediate notification of device-generated events like hardware failures, interface errors, and configuration changes without waiting for the next polling cycle.

Ping and reachability: Continuous ICMP monitoring confirms that every device on your network is reachable. Nagios tracks packet loss and round-trip latency, alerting your team when a host becomes unreachable or response times degrade.

WAN and remote sites: Nagios monitors connectivity and performance across WAN links and remote office locations from a central instance, giving distributed organizations a unified view of network health without deploying separate monitoring infrastructure at each site.

Nagios XI monitors network devices, services, and protocols out of the box, with a configuration wizard for rapid device setup and a customizable dashboard for at-a-glance network health visibility.

Nagios Network Analyzer adds deep NetFlow and sFlow analysis, identifying traffic by host, application, and protocol — ideal for teams that need bandwidth visibility beyond what SNMP polling provides.

Nagios Core (open source) provides the monitoring engine for teams that prefer to build and manage their own configuration.

• Catch outages before users do: continuous polling and SNMP trap handling mean Nagios knows about network failures in seconds, not when the helpdesk phone rings
• Bandwidth visibility at the interface level: know exactly which hosts and applications are consuming capacity, with historical data to back up capacity planning decisions
• Flexible alerting: route alerts by device type, location, severity, or time of day to the right person or team
• Scales from small networks to enterprise: Nagios XI supports distributed monitoring for large or multi-site environments through Nagios Fusion

• Bandwidth Monitoring
• Router Monitoring
• Switch Monitoring
• SNMP Monitoring
• SNMP Trap Management
• LAN & WAN Monitoring
• Ping Monitoring
• DNS Monitoring