You're reading from Mastering Python for Networking and Security Leverage the scripts and libraries of Python version 3.7 and beyond to overcome networking and security issues

Product type Paperback

Published in Jan 2021

Publisher Packt

ISBN-13 9781839217166

Length 538 pages

Edition 2nd Edition

Languages

Python

Tools

Tor

Concepts

Network Security

Author (1):

José Manuel Ortega

View More author details

Table of Contents (22) Chapters

Preface

1. Section 1: The Python Environment and System Programming Tools

2. Chapter 1: Working with Python Scripting FREE CHAPTER

3. Chapter 2: System Programming Packages

4. Section 2: Network Scripting and Extracting Information from the Tor Network with Python

5. Chapter 3: Socket Programming

6. Chapter 4: HTTP Programming

7. Chapter 5: Connecting to the Tor Network and Discovering Hidden Services

8. Section 3: Server Scripting and Port Scanning with Python

9. Chapter 6: Gathering Information from Servers

10. Chapter 7: Interacting with FTP, SFTP, and SSH Servers

11. Chapter 8: Working with Nmap Scanner

12. Section 4: Server Vulnerabilities and Security in Python Modules

13. Chapter 9: Interacting with Vulnerability Scanners

14. Chapter 10: Identifying Server Vulnerabilities in Web Applications

15. Chapter 11: Security and Vulnerabilities in Python Modules

16. Section 5: Python Forensics

17. Chapter 12: Python Tools for Forensics Analysis

18. Chapter 13: Extracting Geolocation and Metadata from Documents, Images, and Browsers

19. Chapter 14: Cryptography and Steganography

20. Assessments

21. Other Books You May Enjoy

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Getting information on DNS servers with DNSPython

In this section, we will create a DNS client in Python and see how this client obtains information about name servers, mail servers, and IPV4/IPV6 addresses.

DNS protocol

DNS stands for Domain Name Server, the domain name service used to link IP addresses with domain names. DNS is a globally-distributed database of mappings between hostnames and IP addresses. It is an open and hierarchical system with many organizations choosing to run their own DNS servers. These servers allow other machines to resolve the requests that originate from the internal network itself to resolve domain names.

The DNS protocol is used for different purposes. The most common are the following:

Names resolution: Given the complete name of a host, it can obtain its IP address.
Reverse address resolution: It is the reverse mechanism to the previous one. It can, given an IP address, obtain the name associated with it.
Mail servers resolution...