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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
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Concepts
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Authors (3):
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Dr. M. O. Faruque Sarker Dr. M. O. Faruque Sarker
Author Profile Icon Dr. M. O. Faruque Sarker
Dr. M. O. Faruque Sarker
Gary Berger Gary Berger
Author Profile Icon Gary Berger
Gary Berger
Pradeeban Kathiravelu Pradeeban Kathiravelu
Author Profile Icon Pradeeban Kathiravelu
Pradeeban Kathiravelu
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Toc

Table of Contents (15) Chapters Close

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 resource records

You may secure your DNS information with transaction signature (TSIG). This ensures a secured authorized update to DNS record. You may receive the Start of Authority (SOA) information of a host with the DNS lookup utilities host and dig. We first look at host utility followed by dig before looking into the Python code for our current recipe to retrieve the same information:

$ host cnn.com
cnn.com has address 151.101.129.67
cnn.com has address 151.101.193.67
cnn.com has address 151.101.1.67
cnn.com has address 151.101.65.67
cnn.com has IPv6 address 2a04:4e42:600::323
cnn.com has IPv6 address 2a04:4e42:400::323
cnn.com has IPv6 address 2a04:4e42:200::323
cnn.com has IPv6 address 2a04:4e42::323
cnn.com mail is handled by 10 mxb-000c6b02.gslb.pphosted.com.
cnn.com mail is handled by 10 mxa-000c6b02.gslb.pphosted.com.
    
$ host axn.com
axn.com has address...
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