Book Image

Practical Linux Security Cookbook - Second Edition

By : Tajinder Kalsi
Book Image

Practical Linux Security Cookbook - Second Edition

By: Tajinder Kalsi

Overview of this book

Over the last few years, system security has gained a lot of momentum and software professionals are focusing heavily on it. Linux is often treated as a highly secure operating system. However, the reality is that Linux has its share of security ?aws, and these security ?aws allow attackers to get into your system and modify or even destroy your important data. But there’s no need to panic, since there are various mechanisms by which these ?aws can be removed, and this book will help you learn about different types of Linux security to create a more secure Linux system. With a step-by-step recipe approach, the book starts by introducing you to various threats to Linux systems. Then, this book will walk you through customizing the Linux kernel and securing local files. Next, you will move on to managing user authentication both locally and remotely and mitigating network attacks. Later, you will learn about application security and kernel vulnerabilities. You will also learn about patching Bash vulnerability, packet filtering, handling incidents, and monitoring system logs. Finally, you will learn about auditing using system services and performing vulnerability scanning on Linux. By the end of this book, you will be able to secure your Linux systems and create a robust environment.
Table of Contents (20 chapters)
Title Page
Copyright and Credits
Contributors
Packt Upsell
Preface
Index

Real time IP LAN monitoring using IPTraf


IPTraf is a tool used for network monitoring. It allows us to analyse the incoming and outgoing network traffic of our Linux server. IPTraf can also be used to analyse the traffic over the LAN, or find the bandwidth's utilization.

Getting ready

IPTraf is a part of the Linux distribution and can be installed using the default repositories of Linux. If we are using an Ubuntu system, you can use apt-get to install the IPTraf package, as follows:

    apt-get install iptraf

How to do it...

Using Iptraf is very simple. Once installed, it can be launched from the terminal just by running a simple command. Let's explore how the tool works:

  1. To start Iptraf, just type the following command in the Terminal:
Iptraf   
  1. This will launch an ASCII-based menu interface. Press any key to continue.
  1. In the next screen, we will get a menu system with different options to choose from, as follows:
  1. We will choose the first option, IP traffic monitor, and press Enter. This will ask...