Top 8 Open Source Network Monitoring & Analysis Tools

1.Xirrus Wi-Fi Inspector

Features built-in tests, enabling you to characterise the integrity and performance of your Wi-Fi network. You can easily gain visibility into your network with this application.

2.Xymon

System for monitoring hosts and networks that is inspired by the Big Brother system. It provides real-time monitoring, an easy web-interface, historical data, availability reports and performance graphs among others.

3.NetXMS

Open source network management system that can be used for monitoring entire IT infrastructures, starting with SNMP-capable hardware (such as switches and routers) to applications on servers.

4.ntopng

Open-source network traffic monitor that is designed to be a high-performance, low-resource replacement for 'ntop'. Released under the GPLv3 software license, ntopng is available for Unix, Linux, BSD, Mac OS X, and Windows.

5.The Dude

The Dude network monitor is a new application which can dramatically improve the way you manage your network environment. It automatically scans all devices within specified subnets, draws and layouts a map of your networks, monitors services of your devices and alerts you in case a service has problems. 

6.Zenoss Core

Using a single, web-based console you can monitor and manage the performance and availability of all devices in your IT infrastructure (network, server, storage, applications, converged infrastructure, virtualisation/cloud).

7.Pandora FMS

Performance and availability monitoring system that uses agents for local monitoring and can do several kinds of remote network monitoring (SNMP v3, TCP checks, remote WMI probes).

8.BandwidthD

Tracks usage of TCP/IP network subnets and builds html files with graphs to display utilisation. Charts are built by individual ip. Color Codes HTTP, TCP,UDP, ICMP, VPN, P2P, etc.