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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

Hiding our traffic with additional random data


Packets generated by Nmap scans usually just have the protocol headers set and, only in certain cases, include specific payloads. Nmap implements a feature to decrease the likelihood of detecting these known probes, by using random data as payloads.

This recipe describes how to send additional random data in packets sent by Nmap during a scan.

How to do it...

To append 300 bytes of random data, open your terminal and type the following command:

# nmap -sS -PS --data-length 300 scanme.nmap.org

How it works...

The argument --data-length <# of bytes> tells Nmap to generate random bytes and append them as data in the requests.

Most of the scanning techniques are supported in this method, but it is important to note that using this argument slows down a scan since we need to transmit more data with each request.

In the following screenshot, a packet generated by a default Nmap scan, and another one where we used the argument --data-length, are shown...

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