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

Collecting signatures of web servers


Nmap is a de facto tool for information gathering, and the variety of tasks that can be done with the Nmap Scripting Engine is simply remarkable. The popular service "ShodanHQ" (http://shodanhq.com) offers a database of HTTP banners, which is useful for analyzing the impact of vulnerabilities. Its users can find out the number of devices that are online, by country, which are identified by their service banners. ShodanHQ uses its own built-in house tools to gather its data, but Nmap is also perfect for this task.

In the following recipe, we will see how to scan indefinitely for web servers, and collect their HTTP headers by using Nmap.

How to do it...

Open your terminal and enter the following command:

$ nmap -p80 -Pn -n -T4 --open --script http-headers,http-title --script-args http.useragent="A friend web crawler (http://someurl.com)",http-headers.useget -oX random-webservers.xml -iR 0

This command will launch an instance of Nmap that will run indefinitely...