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

Product type Paperback

Published in Sep 2021

Publisher Packt

ISBN-13 9781838649357

Length 436 pages

Edition 3rd Edition

Languages

C++

Tools

Nmap

Concepts

Network Security

Author (1):

Paulino Calderon

View More author details

Table of Contents (22) Chapters

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

HTTP user agent

1. Appendix Β: Brute-Force Password Auditing Options

Brute modes

2. Appendix C: NSE Debugging

3. Appendix D: Additional Output Options

4. Appendix Ε: Introduction to Lua

5. Appendix F: References and Additional Reading

Why subscribe?

Discovering hosts with UDP ping scans

Ping scans are used to determine whether a host is responding and can be considered online. UDP ping scans have the advantage of being capable of detecting systems behind firewalls with strict TCP filtering but that have left UDP exposed.

This recipe describes how to perform a UDP ping scan with Nmap and its related options.

How to do it...

Open your terminal and enter the following command:

# nmap -sn -PU <target>

Nmap will determine whether the target is reachable using a UDP ping scan:

# nmap -sn -PU scanme.nmap.org
Nmap scan report for scanme.nmap.org (45.33.32.156) Host is up (0.13s latency).
Other addresses for scanme.nmap.org (not scanned): 2600:3c01::f03c:91ff:fe18:bb2f
Nmap done: 1 IP address (1 host up) scanned in 7.92 seconds

How it works...

The -sn option tells Nmap to skip the port scan phase and to perform host discovery only, and -PU tells Nmap to use UDP ping scanning. UDP ping scanning works as follows...