Free network management software

computer network administration utility used to test the reachability of a host

Wireshark is free and open-source packet analyzer software. It is used for computer network analysis and troubleshooting, software and communications protocol development, and education. Originally named Ethereal, the project was renamed Wireshark in May 2006 due to trademark issues.

Nmap (Network Mapper) is a network scanner created by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich). Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses.

In computing, traceroute and tracert are diagnostic command-line interface commands for displaying possible routes (paths) and transit delays of packets across an Internet Protocol (IP) network.

netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP. The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and investigation tool, since it can produce almost any kind of connection its user could need and has a number of built-in capabilities.

Nagios () is an open-source network and infrastructure monitoring system. It monitors hosts, services, and network devices, sending alerts when components fail and again when they recover. Originally written by Ethan Galstad in 1999 as NetSaint, it was renamed Nagios in 2002 after a trademark dispute. The name is a recursive acronym: "Nagios Ain't Gonna Insist On Sainthood."

Zabbix is an open-source monitoring platform for networks, servers, virtual machines, and cloud services. It collects metrics via SNMP, IPMI, JMX, and custom agents, then stores the data in a relational database and provides alerting, visualization, and reporting through a web-based frontend.

tcpdump is a data-network packet analyzer computer program that runs under a command line interface. It allows the user to display TCP/IP and other packets being transmitted or received over a network to which the computer is attached. Distributed under the BSD license, tcpdump is free software.

Grafana is an open-source analytics and visualization web application. It connects to time series databases and other data sources, allowing users to build dashboards that display metrics, logs, and traces. Grafana supports data sources including Prometheus, Graphite, InfluxDB, Elasticsearch, PostgreSQL, and MySQL.

thumb|RRDtool has a graph function, which presents data from an RRD in a customizable graphical format.

In the field of computer network administration, pcap is an application programming interface (API) for capturing network traffic. While the name is an abbreviation of packet capture, that is not the API's proper name. Unix-like systems implement pcap in the libpcap library; for Windows, there is a port of libpcap named WinPcap that is no longer supported or developed, and a port named Npcap for Windows 7 and later that is still supported.

trend description & measurement

free open source RRDtool

Icinga is an open-source network monitoring system created in 2009 as a fork of Nagios. The project was started by a group of Nagios community developers who cited slow development, limited community input, and insufficient handling of contributed patches as reasons for the fork. The name is a Zulu word meaning "it looks for" or "it examines."

w3af (Web Application Attack and Audit Framework) is an open-source web application security scanner. The project provides a vulnerability scanner and exploitation tool for Web applications. It provides information about security vulnerabilities for use in penetration testing engagements. The scanner offers a graphical user interface and a command-line interface.

software for monitoring computer networks

open source network/system monitoring application

arping is a software utility for discovering hosts on a computer network by sending link layer frames using Address Resolution Protocol (ARP) requests addressed to a host identified by its MAC address. The utility may use ARP to resolve an IP address provided by the user.

Net-SNMP is a suite of software for using and deploying the SNMP protocol (v1, v2c and v3 and the AgentX subagent protocol). It supports IPv4, IPv6, IPX, AAL5, Unix domain sockets and other transports. It contains a generic client library, a suite of command line applications, a highly extensible SNMP agent, perl modules and python modules.

event monitoring and alerting software

dSniff is a set of password sniffing and network traffic analysis tools written by security researcher and startup founder Dug Song to parse different application protocols and extract relevant information. dsniff, filesnarf, mailsnarf, msgsnarf, urlsnarf, and webspy passively monitor a network for interesting data (passwords, e-mail, files, etc.). arpspoof, dnsspoof, and macof facilitate the interception of network traffic normally unavailable to an attacker (e.g., due to layer-2 switching). sshmitm and webmitm implement active man-in-the-middle attacks against redirected SSH and HTTPS sessio

OpenNMS is a free and open-source network monitoring and network management platform written in Java. It provides fault management, performance data collection, service monitoring, event processing, and topology mapping. The project was started in July 1999 and registered on SourceForge as project 4141 in March 2000, making it one of the oldest open-source network management platforms.

global Internet measurement platform

EtherApe is a packet sniffer/network traffic monitoring tool, developed for Unix. EtherApe is free, open source software developed under the GNU General Public License.

Checkmk is an open source IT infrastructure monitoring software system developed in Python and C++. It originated as an extension to Nagios and has since evolved into a self-contained monitoring platform.

monitoring application