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You're reading from  Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition

Product typeBook
Published inSep 2021
PublisherPackt
ISBN-139781838649357
Edition3rd Edition
Tools
Nmap
Concepts
Network Security
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Author (1)
Paulino Calderon
Paulino Calderon
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Paulino Calderon

Paulino Calderon (@calderpwn on Twitter) is the cofounder of Websec, a company offering information security consulting services based in Mexico and Canada. When he is not traveling to a security conference or conducting on-site consulting for Fortune 500 companies, he spends peaceful days in Cozumel, a beautiful small island in the Caribbean, learning new technologies, conducting big data experiments, developing new tools, and finding bugs in software. Paulino is active in the open source community, and his contributions are used by millions of people in the information security industry. In 2011, Paulino joined the Nmap team during the Google Summer of Code to work on the project as an NSE developer. He focused on improving the web scanning capabilities of Nmap, and he has kept contributing to the project since then. In addition, he has been a mentor for students who focused on vulnerability detection during the Google Summer of Code 2015 and 2017. He has published Nmap 6: Network Exploration and Security Auditing Cookbook and Mastering the Nmap Scripting Engine, which cover practical tasks with Nmap and NSE development in depth. He loves attending information security conferences, and he has given talks and participated in workshops in dozens of events in Canada, the United States, Mexico, Colombia, Peru, Bolivia, and Curacao.
Read more about Paulino Calderon

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Detecting whether encryption is enforced in SMB servers

SMB2/3 servers support different features, and we can list those capabilities to check some aspects of their configuration security. Encryption is supported in SMB3 connections, but not everyone uses encryption as it slows down traffic.

This recipe shows how to detect whether encryption is enabled in SMB servers with Nmap.

How to do it...

Open your terminal and enter the following Nmap command:

$ nmap -p445 --script smb2-capabilities <target>

The scan results will include the detected features in the response:

| smb2-capabilities:
|   3.1.1:
|     Distributed File System
|     Leasing
|     Multi-credit operations
|     Encryption

How it works...

The script reads the response to the SMB SMB2_COM_NEGOTIATE command and parses the field describing the server capabilities. This technique...

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Nmap Network Exploration and Security Auditing Cookbook, Third Edition - Third Edition
Published in: Sep 2021Publisher: PacktISBN-13: 9781838649357
© 2021 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Paulino Calderon

Paulino Calderon (@calderpwn on Twitter) is the cofounder of Websec, a company offering information security consulting services based in Mexico and Canada. When he is not traveling to a security conference or conducting on-site consulting for Fortune 500 companies, he spends peaceful days in Cozumel, a beautiful small island in the Caribbean, learning new technologies, conducting big data experiments, developing new tools, and finding bugs in software. Paulino is active in the open source community, and his contributions are used by millions of people in the information security industry. In 2011, Paulino joined the Nmap team during the Google Summer of Code to work on the project as an NSE developer. He focused on improving the web scanning capabilities of Nmap, and he has kept contributing to the project since then. In addition, he has been a mentor for students who focused on vulnerability detection during the Google Summer of Code 2015 and 2017. He has published Nmap 6: Network Exploration and Security Auditing Cookbook and Mastering the Nmap Scripting Engine, which cover practical tasks with Nmap and NSE development in depth. He loves attending information security conferences, and he has given talks and participated in workshops in dozens of events in Canada, the United States, Mexico, Colombia, Peru, Bolivia, and Curacao.
Read more about Paulino Calderon

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