Publisher review:Nmap ("Network Mapper") is a free open source utility for network exploration or security auditing. 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 services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics.
Nmap runs on most types of computers and both console and graphical versions are available.
Nmap is:
- Flexible: Supports dozens of advanced techniques for mapping out networks filled with IP filters, firewalls, routers, and other obstacles. This includes many port scanning mechanisms (both TCP & UDP), OS detection, version detection, ping sweeps, and more.
- Powerful: Nmap has been used to scan huge networks of literally hundreds of thousands of machines.
- Portable: Most operating systems are supported, including Linux, Microsoft Windows, FreeBSD, OpenBSD, Solaris, IRIX, Mac OS X, HP-UX, NetBSD, Sun OS, Amiga, and more.
- Easy: While Nmap offers a rich set of advanced features for power users, you can start out as simply as "nmap -v -A targethost". Both traditional command line and graphical (GUI) versions are available to suit your preference. Binaries are available for those who do not wish to compile Nmap from source.
Nmap 4.21a4 is a C/C++ script for Security Systems scripts design by Fyodor.
It runs on following operating system: Windows / Linux / Mac OS / BSD / Solaris.
Nmap (
Operating system:Windows / Linux / Mac OS / BSD / Solaris
Nmap 4.21a4 script details 
