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Nmap Network Exploration and Security Auditing Cookbook, Third Edition

You're reading from   Nmap Network Exploration and Security Auditing Cookbook, Third Edition Network discovery and security scanning at your fingertips

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Product type Paperback
Published in Sep 2021
Publisher Packt
ISBN-13 9781838649357
Length 436 pages
Edition 3rd Edition
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Author (1):
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Paulino Calderon Paulino Calderon
Author Profile Icon Paulino Calderon
Paulino Calderon
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Table of Contents (22) Chapters Close

Preface 1. Chapter 1: Nmap Fundamentals 2. Chapter 2: Getting Familiar with Nmap's Family FREE CHAPTER 3. Chapter 3: Network Scanning 4. Chapter 4: Reconnaissance Tasks 5. Chapter 5: Scanning Web Servers 6. Chapter 6: Scanning Databases 7. Chapter 7: Scanning Mail Servers 8. Chapter 8: Scanning Windows Systems 9. Chapter 9: Scanning ICS/SCADA Systems 10. Chapter 10: Scanning Mainframes 11. Chapter 11: Optimizing Scans 12. Chapter 12: Generating Scan Reports 13. Chapter 13: Writing Your Own NSE Scripts 14. Chapter 14: Exploiting Vulnerabilities with the Nmap Scripting Engine 15. Other Books You May Enjoy Appendix A: HTTP, HTTP Pipelining, and Web Crawling Configuration Options 1. Appendix Β: Brute-Force Password Auditing Options 2. Appendix C: NSE Debugging 3. Appendix D: Additional Output Options 4. Appendix Ε: Introduction to Lua 5. Appendix F: References and Additional Reading

Listing supported SMB protocols

SMB servers negotiate the dialect version before each connection. Therefore, we can determine the supported protocol dialects in SMB servers remotely. Nmap can determine whether a server supports older and insecure protocols such as SMB1 and even troubleshoot SMB servers.

This recipe shows how to list the supported SMB dialects in a server with Nmap.

How to do it...

Open your terminal and enter the following Nmap command:

$ nmap -p445 --script smb-protocols <target>

The scan results will include the available SMB dialects of that server:

| smb-protocols:
|   dialects:
|     NT LM 0.12 (SMBv1) [dangerous, but default]
|     2.0.2
|     2.1
|     3.0
|     3.0.2
|_    3.1.1

How it works...

The smb-protocols script attempts to initiate a connection using the following...

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