Nmap is a utility for network exploration or security auditing. It supports ping scanning (determine which hosts are up), many port scanning techniques, version detection (determine service protocols and application versions listening behind ports), and TCP/IP fingerprinting (remote host OS or device identification).

Use Linux to do a quick scan of your network. The new beta version of nmap can scan your network for conficker activity. This is a quick easy way to check to see if you are infected; Beware there may be some false positives but at least this will start you down the path of detection.

Umit is a user-friendly graphical interface to Nmap that lets you perform network port scanning. The utility's most useful features are its stored scan profiles and the ability to search and compare saved network scans.

Nmap (“Network Mapper”) is an open source tool for network scanning and security auditing. This intro gives you some basic and interesting Nmap usages with examples on a GNU/Linux system.

The new release of Nmap (free software network port scanner) is here. A primary focus of this release is the Nmap Scripting Engine, which has allowed Nmap to expand up the protocol stack and take network discovery to the next level.

Nmap, or the Network Mapper, is a powerful command-line tool for diagnosing network problems, finding security vulnerabilities, and host of other uses. Its many options and scanning methods can be daunting to even the most experienced of end users, but nmapFE is a graphical interface for nmap that makes it easy to use even the most powerful aspects of the network mapper, and can be a life-saver when you run into networking problems.

Use nmap to discover network elements and to scan ports on those network elements, learn here how to install nmap GUI front ends, and how to use them.

Canonical developer Robert Ancell is working on Simple Scan, a great little program that does exactly what it claims – it makes scanning things simple! Simple Scan is now the default scanning software in Lucid.

Fixing a Problem with Nmap Ever had an ipv4 network address that is supposed to migrate over via a high availability mechanism simply not work or even stranger if there were several addresses some do and some do not?