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Hands-On Enterprise Automation with Python

You're reading from   Hands-On Enterprise Automation with Python Automate common administrative and security tasks with Python

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Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788998512
Length 398 pages
Edition 1st Edition
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Author (1):
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Bassem Aly Bassem Aly
Author Profile Icon Bassem Aly
Bassem Aly
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Table of Contents (20) Chapters Close

Preface 1. Setting Up Our Python Environment 2. Common Libraries Used in Automation FREE CHAPTER 3. Setting Up the Network Lab Environment 4. Using Python to Manage Network Devices 5. Extracting Useful Data from Network Devices 6. Configuration Generator with Python and Jinja2 7. Parallel Execution of Python Script 8. Preparing a Lab Environment 9. Using the Subprocess Module 10. Running System Administration Tasks with Fabric 11. Generating System Reports and System Monitoring 12. Interacting with the Database 13. Ansible for System Administration 14. Creating and Managing VMware Virtual Machines 15. Interacting with the OpenStack API 16. Automating AWS with Boto3 17. Using the Scapy Framework 18. Building a Network Scanner Using Python 19. Other Books You May Enjoy

Using the telnet protocol in Python

Telnet is one of the oldest protocols available in the TCP/IP stack. It is used primarily to exchange data over an established connection between a server and client. It uses TCP port 23 in the server for listening to the incoming connection from the client.

In our case, we will create a Python script that acts as a telnet client, and other routers and switches in the topology will act as the telnet server. Python comes with a native support for telnet via a library called telnetlib so we don't need to install it.

After creating the client object by instantiating it from the Telnet() class, available from the telnetlib module, we can use the two important functions available inside telnetlib, which are read_until() (used to read the output) and write() (used to write on the remote device). Both functions are used to interact with the created...

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