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

Chapter 13. Brute Force Password Auditing Options

This appendix covers the brute force password options supported by the Nmap Scripting Engine. These configuration options sometimes are configured inside the scripts, so you may not need to adjust it to find weak credentials. However, for more comprehensive tests, we at least need to work with custom dictionaries as shown later.

When using brute force password auditing scripts, to use different username and password lists, set the arguments userdb and passdb:

$ nmap --script <brute force script> --script-args userdb=/var/usernames.txt,passdb=/var/passwords.txt <target>

To quit after finding one valid account, use the argument brute.firstOnly:

$ nmap--script <brute force script> --script-args brute.firstOnly <target>

By default, the brute engine (unpwdb) uses Nmap's timing template to set the following timeout limits:

  • -T3,T2,T1: 10 minutes
  • -T4: 5 minutes
  • -T5: 3 minutes

In order to set a different timeout limit, use the argument...