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?

Collecting signatures of web servers

Nmap is an amazing tool for information gathering, and the variety of tasks that can be done with NSE is simply remarkable. The popular service ShodanHQ (https://www.shodan.io/) offers a database with a nice GUI of HTTP banners, which is useful for analyzing the impact of vulnerabilities. Its users can find out the number of devices that are online by country, which are identified by their service banners and IP geolocation. ShodanHQ uses its own built-in house tools to gather its data, but Nmap can easily be used for this task and take advantage of NSE.

In this recipe, we will see how to scan indefinitely for web servers and collect their HTTP headers with Nmap.

How to do it...

Open your terminal and enter the following command:

$ nmap -p80,443 -Pn -T4 --open --script http-headers,http-title,ssl-cert --script-args http.useragent="A friendly web crawler (http://calderonpale.com)",http-headers.useget -oX random-webservers.xml...