Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By : Paulino Calderon
Book Image

Nmap: Network Exploration and Security Auditing Cookbook - Second Edition

By: Paulino Calderon

Overview of this book

This is the second edition of ‘Nmap 6: Network Exploration and Security Auditing Cookbook’. A book aimed for anyone who wants to master Nmap and its scripting engine through practical tasks for system administrators and penetration testers. Besides introducing the most powerful features of Nmap and related tools, common security auditing tasks for local and remote networks, web applications, databases, mail servers, Microsoft Windows machines and even ICS SCADA systems are explained step by step with exact commands and argument explanations. The book starts with the basic usage of Nmap and related tools like Ncat, Ncrack, Ndiff and Zenmap. The Nmap Scripting Engine is thoroughly covered through security checks used commonly in real-life scenarios applied for different types of systems. New chapters for Microsoft Windows and ICS SCADA systems were added and every recipe was revised. This edition reflects the latest updates and hottest additions to the Nmap project to date. The book will also introduce you to Lua programming and NSE script development allowing you to extend further the power of Nmap.
Table of Contents (25 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
13
Brute Force Password Auditing Options
17
References and Additional Reading

Including the reason for a port or host state


To make Nmap, include the reason why a port is marked as opened or closed and why the host is marked as alive; use the option --reason, as shown in the following command:

$ nmap --reason <target>

The option --reason will make Nmap include the packet type that determined the port and host state. We have the following example:

$ nmap --reason scanme.nmap.org
   Nmap scan report for scanme.nmap.org (74.207.244.221)
   Host is up, received echo-reply (0.12s latency).
   Not shown: 96 closed ports
   Reason: 96 resets
   PORT    STATE    SERVICE REASON
   22/tcp  open     sshsyn-ack
   25/tcp  filtered smtp    no-response
   80/tcp  open     http    syn-ack
   646/tcp filtered ldp     no-response
   Nmap done: 1 IP address (1 host up) scanned in 3.60 seconds