Monitor your network and identify the loopholes or bugs that slow down your network with help of these free network tools. Check the performance using these network tools and can do several kinds of remote network monitoring things such as SNMP v3, TCP checks, remote WMI probes and more.
1.Nagios: Network Tools
Nagios is a powerful, enterprise-class host, service, application, and network monitoring program. Nagios runs on NIX hosts and can monitor Windows, Linux/Unix/BSD, Netware, and network devices.
A Unified Monitoring for all your devices and applications – virtual or physical. Provides event handling, notifications, dashboards, and much more.
Ganglia is a scalable distributed monitoring system for high-performance computing systems such as clusters and Grids. It is based on a hierarchical design targeted at federations of clusters.
4.Angry IP Scanner: Network Tools
Angry IP scanner is fast and friendly network scanner for Windows, Linux, and Mac. It is very extensible, allowing it to be used for a very wide range of purposes, with the primary goal of being useful to network administrators.
5.NetworkMiner packet analyzer: Network Tools
NetworkMiner is a Network Forensic Analysis Tool (NFAT) for Windows that can detect the OS, hostname and open ports of network hosts through packet sniffing or by parsing a PCAP file.
6.Pandora FMS: Flexible Monitoring System
Pandora FMS is a performance & availability monitoring system, ready for big environments. It uses agents for local monitoring and can do several kinds of remote network monitoring (SNMP v3, TCP checks, remote WMI probes…)
NSClient++ is a windows service that allows performance metrics to be gathered by Nagios.It is an attempt to create an NSClient and NRPE compatible but yet extendable performance service for windows.
jNetMap is a graphical network monitoring and documentation tool. It will ping all registered devices every x minute, updating the status according to the result of the ping.