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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]
Iproute2 is a collection of utilities for controlling TCP / IP networking and traffic control in Linux.
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?".
Vyatta software is a Linux-based, open networking (advanced routing & security) solution that leverages x86 hardware and components to deliver a flexible, affordable alternative to Cisco 1800 through 7200 series routers. Vyatta is a enterprise class, commercial open source offering that can ... [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.
Big Brother is the simplest tool for monitoring IP-network for troubles. It gives a comprehensive picture of what happened to any point on the Net that has been put in.
A framework of frameworks for rapid application development in Python. It includes packages for XML and XHTML parsing and generating, SNMP manager, SMI query API, Cisco-style CLI framework, QA automation, program control, and more.
nut manages your network devices (dhcp, static, zeroconf); currently only supports IPv4 on Linux. Support for wpa_assistant is included in the client.