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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

Encrypting the swap partition with eCryptfs

If you’re just encrypting individual directories with eCryptfs instead of using LUKS whole-disk encryption, you’ll need to encrypt your swap partition in order to prevent accidental data leakage. Fixing that problem requires just one simple command:

donnie@ubuntu:~$ sudo ecryptfs-setup-swap
WARNING:
An encrypted swap is required to help ensure that encrypted files are not leaked to disk in an unencrypted format.
HOWEVER, THE SWAP ENCRYPTION CONFIGURATION PRODUCED BY THIS PROGRAM WILL BREAK HIBERNATE/RESUME ON THIS SYSTEM!
NOTE: Your suspend/resume capabilities will not be affected.
Do you want to proceed with encrypting your swap? [y/N]: y
INFO: Setting up swap: [/dev/sda5]
WARNING: Commented out your unencrypted swap from /etc/fstab
swapon: stat of /dev/mapper/cryptswap1 failed: No such file or directory
donnie@ubuntu:~$

Don’t mind the warning about the missing /dev/mapper/cryptswap1 file. It will get created...

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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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