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

Checking whether a web server is an open proxy


HTTP proxies are used to make requests through their addresses, therefore hiding our real IP address from the target. Detecting them is important if you are a system administrator who needs to keep the network secure or as an attacker looking to spoof your real origin. Misconfigured web servers are more common than we think, and they could be abused by attackers if left exposed.

This recipe shows you how to use Nmap to detect an open HTTP proxy.

How to do it...

Open your terminal and enter the following command:

$ nmap --script http-open-proxy -p8080 <target>

The results include the HTTP methods that were successfully tested and if the proxy is indeed exposed:

   PORT     STATE SERVICE 
   8080/tcp open  http-proxy 
   |  proxy-open-http: Potentially OPEN proxy. 
   |_ Methods successfully tested: GET HEAD CONNECT

How it works...

We use the Nmap options --script http-open-proxy -p8080 to launch the NSE script http-open-proxy if a web server is...