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Mastering Linux Security and Hardening

You're reading from   Mastering Linux Security and Hardening Protect your Linux systems from intruders, malware attacks, and other cyber threats

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Product type Paperback
Published in Feb 2020
Publisher
ISBN-13 9781838981778
Length 666 pages
Edition 2nd Edition
Tools
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Author (1):
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Donald A. Tevault Donald A. Tevault
Author Profile Icon Donald A. Tevault
Donald A. Tevault
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Table of Contents (20) Chapters Close

Preface 1. Section 1: Setting up a Secure Linux System
2. Running Linux in a Virtual Environment FREE CHAPTER 3. Securing User Accounts 4. Securing Your Server with a Firewall - Part 1 5. Securing Your Server with a Firewall - Part 2 6. Encryption Technologies 7. SSH Hardening 8. Section 2: Mastering File and Directory Access Control (DAC)
9. Mastering Discretionary Access Control 10. Access Control Lists and Shared Directory Management 11. Section 3: Advanced System Hardening Techniques
12. Implementing Mandatory Access Control with SELinux and AppArmor 13. Kernel Hardening and Process Isolation 14. Scanning, Auditing, and Hardening 15. Logging and Log Security 16. Vulnerability Scanning and Intrusion Detection 17. Security Tips and Tricks for the Busy Bee 18. Assessments 19. Other Books You May Enjoy

Locking user accounts

Okay, you've just seen how to have Linux automatically lock user accounts that are under attack. There will also be times when you'll want to be able to manually lock out user accounts. Let's look at a few examples:

  • When a user goes on vacation and you want to ensure that nobody monkeys around with that user's account while he or she is gone
  • When a user is under investigation for questionable activities
  • When a user leaves the company

With regard to the last point, you may be asking yourself, Why can't we just delete the accounts of people who are no longer working here? And, you certainly can, easily enough. However, before you do so, you'll need to check with your local laws to make sure that you don't get yourself into deep trouble. Here in the United States, for example, we have the Sarbanes-Oxley law, which restricts...

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