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 ICMP ping scans

Ping scans are used to determine whether a host is online. ICMP echo request messages were designed specifically for this task, and naturally, ICMP ping scans use these packets to reliably detect the status of a host.

This recipe describes how to perform an ICMP ping scan with Nmap and the flags for the different types of supported ICMP messages.

How to do it...

To make an ICMP echo request, open your terminal and enter the following command:

# nmap -sn -PE <target>

If the host responded, you should see something similar to this:

# nmap -sn -PE scanme.nmap.org
Nmap scan report for scanme.nmap.org (74.207.244.221) Host is up (0.089s latency).
Nmap done: 1 IP address (1 host up) scanned in 13.25 seconds

How it works...

The -sn -PE options tell Nmap to send an ICMP echo request packet to the scanme.nmap.org host. We can determine that a host is online if we receive an ICMP echo reply to this probe. Using the --packet...