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Mastering Linux Security and Hardening - Third Edition

You're reading from Mastering Linux Security and Hardening - Third Edition

Product type Book

Published in Feb 2023

Publisher Packt

ISBN-13 9781837630516

Pages 618 pages

Edition 3rd Edition

Languages

Concepts

Information Security

Author (1):

Donald A. Tevault

Table of Contents (22) Chapters

Preface

1. Section 1: Setting up a Secure Linux System

2. Running Linux in a Virtual Environment

3. Securing Administrative User Accounts

4. Securing Normal User Accounts

5. Securing Your Server with a Firewall – Part 1

6. Securing Your Server with a Firewall — Part 2

7. Encryption Technologies

8. SSH Hardening

9. Section 2: Mastering File and Directory Access Control (DAC)

10. Mastering Discretionary Access Control

11. Access Control Lists and Shared Directory Management

12. Section 3: Advanced System Hardening Techniques

13. Implementing Mandatory Access Control with SELinux and AppArmor

14. Kernel Hardening and Process Isolation

15. Scanning, Auditing, and Hardening

16. Logging and Log Security

17. Vulnerability Scanning and Intrusion Detection

18. Prevent Unwanted Programs from Running

19. Security Tips and Tricks for the Busy Bee

20. Other Books You May Enjoy

21. Index

Implementing Mandatory Access Control with SELinux and AppArmor

As we saw in previous chapters, Discretionary Access Control (DAC) allows users to control who can access their own files and directories. But what if your company needs to have more administrative control over who accesses what? For this, we need some sort of Mandatory Access Control (MAC).

The best way I know to explain the difference between DAC and MAC is to hearken back to my Navy days. I was riding submarines at the time, and I had to have a Top Secret clearance to do my job. With DAC, I had the physical ability to take one of my Top Secret books to the mess decks, and hand it to a cook who didn’t have that level of clearance. With MAC, there were rules that prevented me from doing so. On operating systems, things work pretty much the same way.

There are several different MAC systems that are available for Linux. The two that we’ll cover in this chapter are SELinux and AppArmor. We’ll...

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Authors (1)

Donald A. Tevault

Donald A. Tevault - but you can call him Donnie - got involved with Linux way back in 2006, and has been working with it ever since. He holds the Linux Professional Institute Level 3-Security certification, and the GIAC Incident Handler certification. Donnie is a professional Linux trainer, and thanks to the magic of the internet, teaches Linux classes literally the world over from the comfort of his living room. He's also a Linux security researcher for an IoT security company.

See other products by Donald A. Tevault

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