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Python Network Programming Cookbook

You're reading from   Python Network Programming Cookbook Practical solutions to overcome real-world networking challenges

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Product type Paperback
Published in Aug 2017
Publisher Packt
ISBN-13 9781786463999
Length 450 pages
Edition 2nd Edition
Languages
Tools
Concepts
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Authors (3):
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Pradeeban Kathiravelu Pradeeban Kathiravelu
Author Profile Icon Pradeeban Kathiravelu
Pradeeban Kathiravelu
Gary Berger Gary Berger
Author Profile Icon Gary Berger
Gary Berger
Dr. M. O. Faruque Sarker Dr. M. O. Faruque Sarker
Author Profile Icon Dr. M. O. Faruque Sarker
Dr. M. O. Faruque Sarker
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Toc

Table of Contents (22) Chapters Close

Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface
1. Sockets, IPv4, and Simple Client/Server Programming FREE CHAPTER 2. Multiplexing Socket I/O for Better Performance 3. IPv6, Unix Domain Sockets, and Network Interfaces 4. Programming with HTTP for the Internet 5. Email Protocols, FTP, and CGI Programming 6. Programming Across Machine Boundaries 7. Working with Web Services – XML-RPC, SOAP, and REST 8. Network Monitoring and Security 9. Network Modeling 10. Getting Started with SDN 11. Authentication, Authorization, and Accounting (AAA) 12. Open and Proprietary Networking Solutions 13. NFV and Orchestration – A Larger Ecosystem 14. Programming the Internet

Finding DNS names of a network


There are a few libraries in Python for managing the Domain Name Servers (DNS) of the internet. Each network administrator needs to effectively manage the DNS mappings of their network. In this recipe, we will start by introducing dnspython, a simple DNS toolkit developed in Python to manage DNS.

Getting ready

First, install dnspython (https://github.com/rthalley/dnspython) using the pip:

$ sudo pip install dnspython

How to do it...

We import dns.name of dnspython to do a simple exercise to find the DNS names from the user inputs of two web URLs, and how these web URLs are related.

Listing 11.1 evaluates the user input of two web URLs for the DNS names as follows:

#!/usr/bin/env python 
# Python Network Programming Cookbook, Second Edition 
  -- Chapter - 11 
# This program is optimized for Python 2.7.12 and
  Python 3.5.2. 
# It may run on any other version with/without
  modifications. 
 
 
import argparse 
import dns.name 
 
def main(site1, site2): 
    _site1...
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