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 (18 chapters)
13
Brute Force Password Auditing Options
17
References and Additional Reading

Working with NSE threads, condition variables, and mutexes in NSE

The Nmap Scripting Engine offers finer control over script parallelism by implementing threads, condition variables, and mutexes. Each NSE script is normally executed inside a Lua coroutine or thread, but it may yield additional worker threads if the programmer decides to do so.

This recipe will teach you how to deal with parallelism in NSE.

How to do it...

NSE threads are recommended for scripts that need to perform network operations in parallel. Let's see how to create NSE threads and use mutexes and condition variables:

  1. To create a new NSE thread, use the function new_thread() from the library stdnse:
   local co = stdnse.new_thread(worker_main_function, arg1, arg2,      
arg3, ...)
...