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Nmap ("Network Mapper") is a free open source utility for network exploration or security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what ... [More]
Cacti is a complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. Cacti provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features out of the box. All of this is wrapped in an ... [More]
Icinga is a monitoring system based on Nagios. It extends its capabilities and delivers new features like libdbi for database abstraction, well written APIs and a new, easy to extend webinterface.
OpenNMS is the world's first enterprise grade network management platform developed under the open source model. It consists of a community supported open-source project as well as a commercial services, training and support organization.
iftop does for network usage what top(1) does for CPU usage. It listens to network traffic on a named interface and displays a table of current bandwidth usage by pairs of hosts. Handy for answering the question "why is our ADSL link so slow?".
Observium is an autodiscovering PHP/MySQL/SNMP based network monitoring which includes support for a wide range of network hardware and operating systems including Cisco, Linux, FreeBSD, Juniper, Foundry, HP and many more. Observium has grown out of a lack of easy to configure and easy use NMSes. ... [More]
Pandora FMS is a monitoring software which helps you to detect problems before they happen, managing your IT infraestructure: servers, networking and applications. Pandora FMS - F is for "Flexibility", if something has insformation, Pandora can grab it. Nice GUI with Ajax/HTML ... [More]
Opsview Core is an open source network monitoring software application that solves the challenges of monitoring modern IT and network systems.
Untangle delivers an integrated family of applications that help you simplify and consolidate the network and security products you need, in one place at the network gateway. The most popular applications let businesses block spam, spyware, viruses, and phish, filter out inappropriate web content ... [More]
vnStat is a console-base network traffic monitor that keeps a log of daily and monthly network traffic for the selected interface. However, it isn't a packet sniffer. The traffic information is analyzed from the /proc -filesystem, so that vnStat can be used without root permissions.
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