December 13, 2007 -- Insecure.Org is pleased to announce the immediate, free availability of the Nmap Security Scanner version 4.50 from http://insecure.org/nmap/. Nmap was first released in 1997, so this release celebrates our 10th anniversary.

This is the first stable release since 4.20 (more than a year ago), and the first major release since 4.00 almost two years ago. Dozens of development releases led up to this. Major new features since 4.00 include the Zenmap cross-platform GUI, 2nd Generation OS Detection, the Nmap Scripting Engine, a rewritten host discovery system, performance optimization, advanced traceroute functionality, TCP and IP options support, and and nearly 1,500 new version detection signatures. More than 300 other improvements were made as well.