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

Tripwire


With the increasing numbers of attacks on servers nowadays, administering the server while ensuring security is becoming a complex problem. To be sure that every attack has been effectively blocked is difficult to know. Tripwire is a host-based Intrusion Detection System (IDS), which can be used to monitor different filesystem data points and then alert us if any file is modified or changed.

Getting ready

We only need to install the Tripwire package on our Linux system to configure our IDS. In the next section, we will see how to install and configure the tool.

How to do it...

We will discuss how to install and configure Tripwire on our Ubuntu system in the following steps:

  1. The first step will be to install the Tripwire package using apt-get, as shown here:
  1. During the installation process, it will show an information window. Click OK to continue.
  2. In the next window, select Internet Site for type of mail configuration and click Ok:
  1. In the next window, it will ask for system mail name. Enter...