Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

Book Image

Nmap 6: Network Exploration and Security Auditing Cookbook

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)
Nmap 6: Network Exploration and Security Auditing Cookbook
Credits
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
References
Index

Discovering valid e-mail accounts using Google Search


Finding valid e-mail accounts is an important task during a penetration test. E-mail accounts are often used as usernames in some systems and web applications. Attackers often target the highly sensitive information that is stored in them.

This recipe shows you how to use Nmap to discover valid e-mail accounts that could be used as usernames in some web applications or during brute force password auditing, to find weak credentials.

Getting ready

For this task we need an NSE script that is not distributed with Nmap officially. Download the NSE script http-google-search.nse from http://seclists.org/nmap-dev/2011/q3/att-401/http-google-email.nse.

Update your NSE script database by executing the following command:

# nmap --script-updatedb

The following message will be displayed:

NSE: Updating rule database. 
NSE: Script Database updated successfully. 

How to do it...

To find valid e-mail accounts using Google Search and Google Groups by using...