Nmap Network Scanning

Nmap Network Scanning is the official guide to the Nmap Security
Scanner, a free and open source utility used by millions of people for
network discovery, administration, and security auditing. From
explaining port scanning basics for novices to detailing low-level
packet crafting methods used by advanced hackers, this book by Nmap’s
original author suits all levels of security and networking
professionals. The reference guide documents every Nmap feature and
option, while the remainder demonstrates how to apply them to quickly
solve real-world tasks. Examples and diagrams show actual
communication on the wire. Topics include subverting firewalls and
intrusion detection systems, optimizing Nmap performance, and
automating common networking tasks with the Nmap Scripting Engine.