Open Source

An open source network monitoring tool with integrated network mapping.

A time series database for the Windows PowerShell and .NET environment. (I wrote this tool so its presence in this directory isn't entirely on the basis of how good it may or may not be.)

NMap is one of the more famous open source network mappers or security scanners.

OP5 is an open source network monitor built upon the Nagios core software.

Nagios® is a comprehensive and fully featured host and service network problem monitoring system.

JFFNMS is a Network Management System designed to mantain a IP/SNMP/Syslog/ Tacacs+ Network but can also be used to monitor any standards compliant SNMP device, Server, TCP port, or Custom Poller. Supports some Cisco routers/switches.

Sysmon is a high performance, accurate network monitoring tool.

NeTraMet is an accounting meter which builds up packet and byte counts for traffic flows.

Hyperic is an enterprise grade open source monitoring system built from the ground up with Java.

Zenoss is an enterprise-grade open source monitoring platform. Zenoss products provide application, server, and network management capabilities built on the python-based Zope application server.

The BPFT daemon builds on top of libpcap and uses the BPF (Berkeley Packet Filter) mechanism for capturing IP traffic.

Extreme Happy NetFlow Tool or just EHNT turns streams of Netflow data into something useful and human-readable.

Flow-tools is a library and a collection of programs used to collect, send, process, and generate reports from NetFlow data.

Nemesis is a command-line network packet crafting and injection utility for UNIX-like and Windows systems built on top of NMap.

A Java based tool for simulating a variety of network types and scenarios. A command language is used so you don’t need to be a Java engineer to use this tool.

SNMPSTAT is network-monitoring system, designed to monitor standard network routers, switches and firewalls using SNMP

Big Sister monitors systems, tracks current status and status change history, and triggers alarms.

NodeWatch is a network monitoring polling tool. It logs connectivity changes and performs user defined commands.

Autostatus is a network and server monitoring program designed to support large complex networks.

RRDTool (Round Robin Database Tool) is a system to store, display and graph time-series data. Many open source network management tools are built upon the functionality provided by RRDTool.

HotSaNIC (Html overview to System and Network Information Center) consists of a set of perl-scripts built on Tobias Oetiker’s rrdtool to generate graphical system-statistics.

NRG is a system for maintaining and visualizing network data and other resource utilization data.

Torrus is designed to be the universal data series processing framework. Its scalable hierarchical design, application-independent core, and highly customizable architecture make Torrus an attractive choice both for small installations and for big enterprise or carrier networks.

RTG is a flexible, scalable, high-performance SNMP statistics monitoring system.

Cacti is a complete frontend to rrdtool, it stores all of the nessesary information to create graphs and populate them with data in a MySQL database. The frontend is completely PHP driven.

A full feature protocol analyzer program running on Microsoft Windows.

OURMON: ethernet promiscuous mode packet capture and analysis system.

A packet injection engine for both *nix and windows.

A python wrapper library for both libpcap and winpcap.

A perl wrapper for the libpcap library.

WinPcap is the industry-standard tool for link-layer network access in Windows environments: it allows applications to capture and transmit network packets bypassing the protocol stack, and has additional useful features, including kernel-level packet filtering, a network statistics engine and support for remote packet capture. All well known open source networking tools like Ethereal, ntop, nmap, snort and windump use winpcap.

Simple GraphViz based network mapping tool.