Best Network Monitoring Open Source Software Image

Best Network Monitoring Open Source Software

Top network monitoring software programs. The best network monitoring open source software is listed here. Network monitoring open source computer programs are useful to keep track of the state of your network and computer systems, including the availability and performance of the different network services running on your servers. Network monitoring open source software offers both command line and GUI graphical user interface.

OpenNMS is an enterprise grade network monitoring, network management and network availability solution that ensures the stability of your IT infrastructure. The core of the OpenNMS project is a powerful set of Java libraries that can be used to build network management applications capable of handling large networks and complex environments, like firewalls, databases, gateways, load balancers, proxies.



Zabbix is an open source monitoring tool suite that includes network monitoring. The network monitoring capabilties of Zabbix includes performance metric analysis, such as bandwidth usage, packet loss, and CPU/memory utilization. It can also detect network node and connection health problems by checking for devices in critical condition. Zabbix can alert you when hardware functions are dropping (fan speed of a network device is low) or when an SNMP check is not responded to.

Nagios Core

Nagios Core (formerly Nagios) is one of the most popular open-source infrastructure monitoring tools, with enhanced monitoring capabilities for networks, systems, and servers. The self-described “industry standard in IT infrastructure monitoring,” Nagios schedules and automates monitoring tasks for better network performance.

Easy to configure, Nagios alerts you to network performance and security issues so you can take swift action and prevent further problems. You can also manage networks from a simple dashboard that provides real-time analytics about crashed servers, slow applications, and more.

Spiceworks Network Monitor

spiceworks free open source network monitoring tools

Spiceworks Network Monitor is a free network monitoring program and one of several networking tools that Spiceworks offers. Their monitoring solution offers real-time monitoring capabilities for networks and devices. You can perform ping checks to verify that your network and all connected nodes are currently functional. The tool also supports common network protocols, like HTTP and SIP, or user-defined custom protocols, as well as custom settings for alerts based on sensitivity.


Prometheus is an open-source network monitoring tool that alerts users about all kinds of network-related issues such as low latency, memory utilization, and cyber crime. Built at SoundCloud, Prometheus searches for metrics from network tasks and displays them in an easy-to-use dashboard for analysis.

It runs on Windows operating systems and supports a variety of networking infrastructure such as Cisco. Other features include Netflow flow analysis. Network problems range in severity, and Prometheus distinguishes between minor issues and major problems so you won’t receive hundreds of notifications. (The platform only alerts you about serious network vulnerabilities.)

EventSentry Light


EventSentry Light is a free version of EventSentry’s SIEM, server monitoring, and network monitoring tool suite. The Light version still features the same event log monitoring capabilities as the full version, so your enterprise can collect and interpret data from logs on devices connected to your network. EventSentry Light also handles system health monitoring functions, including service monitoring, performance issue monitoring, and hardware failure monitoring.


Graphite is an open-source FOSS tool that tracks time-series data such as network performance. The platform then displays this data for users on a dashboard, simplifying network management considerably. Though Graphite is one of the most-used open-source tools for network monitoring, the platform has many limitations.

Users are not able to view insights as teams or extract and load data to an external database or data warehouse. Still, Graphite’s excellent reporting capabilities help organizations spot network deficiencies quickly.


cacti free open source network monitoring tools

Cacti is an open source network monitoring tool based on RRDTool’s data logging and graphing system. The tool uses network polling and data collection functionality to gather information on devices on networks of any size. This includes the ability to design custom scripts for data collection alongside support for SNMP polling. It then displays this information in easy-to-understand graphs which can be arranged in whatever hierarchy your business is most comfortable with.


icinga free open source network monitoring tools

Icinga is an open source network monitoring tool that measures network availability and performance. Through a web interface, your enterprise can observe hosts and applications across your entire network infrastructure. The tool is natively scalable and can easily be configured to work with every kind of device. There are also a handful of Icinga modules for specific monitoring capabilities, such as monitoring for VMWare’s vSphere cloud environment and business process modelling.


Monitorix is a network monitoring solution for the Linux ecosystem that shows network-related information as basic graphs for further analysis. As a free solution, Monitorix has limitations, but the platform is effective at detecting failures, long response times, and network security issues.

Monitorix describes itself as “lightweight.” Users might notice the platform doesn’t have many of the advanced network monitoring features or performance capabilities of Zabbix and Nagios.

LogRhythm NetMon Freemium

logrhythm free open source network monitoring tools

LogRhythm NetMon Freemium is a free version of LogRhythm NetMon that provides the same enterprise-grade packet capturing and analysis capabilities as the full version. While there are limits on packet storage and data processing, The freemium version still allows users to perform network threat detection and response functions based on data packet analysis. It also provides the same network threat alerting system as the full version, allowing you to stay up to date on your network’s performance and security.



LibreNMS is an open source network monitoring system that uses several network protocols to observe every device on your network. The LibreNMS API can retrieve, manage, and graph the data it collects and supports horizontal scaling to grow its monitoring capabilities alongside your network. The tool features a flexible alerting system that is tailor-made to communicate with you via the method that works best for your company. They offer native iOS and Android apps as well.


Observium is network monitoring software that supports Cisco, Windows, Dell, HP, VMware, and other network types and devices. With a simple user interface, add-ons, and lots of alerting features, you can optimize network infrastructure and network performance.

Adding devices to Observium is easy. However, if you do run into any problems, there are a lot of help and troubleshooting resources to help you sort it all out.


keep an eye on critical network devices through a comprehensive monitoring dashboard.

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