This book is all about Nmap, a great tool for scanning networks. The author takes you through a series of steps to help you transition from Nmap beginner to an expert. The book covers everything about Nmap, from the basics to the complex aspects. Other than the command line Nmap, the author guides you on how to use Zenmap, which is the GUI version of Nmap. You will know the various kinds of vulnerabilities that can be detected with Nmap and how to detect them. You will also know how to bypass various network security mechanisms such as firewalls and intrusion detection systems using Nmap. The author also guides you on how to optimize the various Nmap parameters so as to get an optimal performance from Nmap. The book will familiarize you with various Nmap commands and know how to get various results by altering the scanning parameters and options. The author has added screenshots showing the outputs that you should get after executing various commands. Corresponding explanations have also been added. This book will help you to understand: - NMAP Fundamentals - Port Scanning Techniques - Host Scanning - Scan Time Reduction Techniques - Scanning Firewalls - OS Fingerprinting - Subverting Intrusion Detection Systems - Nmap Scripting Engine - Mail Server Auditing - Scanning for HeartBleed Bug - Scanning for SMB Vulnerabilities - ZeNmap GUI Guide - Server Penetration Topics include: network exploration, network scanning, gui programming, nmap network scanning, network security, nmap 6 cookbook, zeNmap.