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Nmap 6: Network Exploration and Security Auditing Cookbook

Nmap 6: Network Exploration and Security Auditing Cookbook

4.7 (9)
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Nmap 6: Network Exploration and Security Auditing Cookbook

Nmap 6: Network Exploration and Security Auditing Cookbook

4.7 (9)

Overview of this book

Nmap is a well known security tool used by penetration testers and system administrators. The Nmap Scripting Engine (NSE) has added the possibility to perform additional tasks using the collected host information. Tasks like advanced fingerprinting and service discovery, information gathering, and detection of security vulnerabilities."Nmap 6: Network exploration and security auditing cookbook" will help you master Nmap and its scripting engine. You will learn how to use this tool to do a wide variety of practical tasks for pentesting and network monitoring. Finally, after harvesting the power of NSE, you will also learn how to write your own NSE scripts."Nmap 6: Network exploration and security auditing cookbook" is a book full of practical knowledge for every security consultant, administrator or enthusiast looking to master Nmap. The book overviews the most important port scanning and host discovery techniques supported by Nmap. You will learn how to detect mis-configurations in web, mail and database servers and also how to implement your own monitoring system. The book also covers tasks for reporting, scanning numerous hosts, vulnerability detection and exploitation, and its strongest aspect; information gathering.
Table of Contents (18 chapters)
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Nmap 6: Network Exploration and Security Auditing Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
References
Index

Writing your own NSE library


There are times when you will realize that the code you are writing could be put into a library to be re-used by other NSE scripts. The process of writing an NSE library is straightforward, and there are only certain things that we need to consider, such as not accessing global variables used by other scripts. Although Lua modules are preferred, the Nmap Scripting Engine also supports C modules via the Lua C API, for those looking for that extra performance.

This recipe will teach you how to create your own Lua NSE library.

How to do it...

Creating a library has a similar process to writing scripts. Just keep in mind the scope of the variables that you are working with. Let's create a simple library:

  1. Create a new file mylibrary.lua, and start by typing the required libraries you may need:

    local math = require "math"
  2. Now, simply add the functions to your library. We will create a function that returns the classic "Hello World!" message:

    function hello_word()
      return...

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