Book Image

Mastering Python for Networking and Security - Second Edition

By : José Ortega
Book Image

Mastering Python for Networking and Security - Second Edition

By: José Ortega

Overview of this book

It’s now more apparent than ever that security is a critical aspect of IT infrastructure, and that devastating data breaches can occur from simple network line hacks. As shown in this book, combining the latest version of Python with an increased focus on network security can help you to level up your defenses against cyber attacks and cyber threats. Python is being used for increasingly advanced tasks, with the latest update introducing new libraries and packages featured in the Python 3.7.4 recommended version. Moreover, most scripts are compatible with the latest versions of Python and can also be executed in a virtual environment. This book will guide you through using these updated packages to build a secure network with the help of Python scripting. You’ll cover a range of topics, from building a network to the procedures you need to follow to secure it. Starting by exploring different packages and libraries, you’ll learn about various ways to build a network and connect with the Tor network through Python scripting. You will also learn how to assess a network's vulnerabilities using Python security scripting. Later, you’ll learn how to achieve endpoint protection by leveraging Python packages, along with writing forensic scripts. By the end of this Python book, you’ll be able to use Python to build secure apps using cryptography and steganography techniques.
Table of Contents (22 chapters)
1
Section 1: The Python Environment and System Programming Tools
4
Section 2: Network Scripting and Extracting Information from the Tor Network with Python
8
Section 3: Server Scripting and Port Scanning with Python
12
Section 4: Server Vulnerabilities and Security in Python Modules
16
Section 5: Python Forensics

Connecting with SSH servers with paramiko and pysftp

In this section, we will review the SSH protocol and the paramiko module, which provide us with the necessary methods to create SSH clients in an easy way.

The SSH protocol is one of the most used today because it uses symmetric and asymmetric cryptography to provide confidentiality, authentication, and integrity to the transmitted data.

The communication security is enhanced between the client and server thanks to encryption and the use of public and private keys.

SSH has become a very popular network protocol for performing secure data communication between two computers. Both of the parts in communication use SSH key pairs to encrypt their communications.

Each key pair has one private and one public key. The public key can be published to anyone who may be interested, and the private key is always kept private and secure from everyone except the key owner.

Public and private SSH keys can be generated and digitally...