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

Things to remember when working with Lua


The following are concepts that you need to keep in mind when working with Lua.

Comments

A comment can be anything in between two hyphens and the next end of line:

   --This is a comment

Comment blocks are also supported. They are delimited by the characters --[[ and ]]:

   --[[
   This is a multi-line
   comment block.
   ]]

Dummy assignments

There are occasions where you don’t need all the information returned by a function, and in Lua, you can use dummy assignments to discard a return value. The operator is _ (underscore):

   local _, _, item = string.find(<string>, <pattern with capture>)

Indexes

Indexes start at one, not zero:

   z={"a","b","c"}
   z[1]="b" --This assignment will change the content of the table to    
   {"b","b","c"}

However, you can initialize an array at any value:

   nmap = {}
   for x=-1337, 0 do
     nmap[x] = 1
   end

Note

Keep in mind that all Lua libraries will stick to this convention.

 

 

Semantics

Due to its flexibility...