You're reading from SELinux System Administration, Third Edition Implement mandatory access control to secure applications, users, and information flows on Linux

Product type Paperback

Published in Dec 2020

Publisher Packt

ISBN-13 9781800201477

Length 458 pages

Edition 3rd Edition

Tools

Docker

Concepts

System Administration

Author (1):

Sven Vermeulen

Preface

1. Section 1: Using SELinux

2. Chapter 1: Fundamental SELinux Concepts FREE CHAPTER

3. Chapter 2: Understanding SELinux Decisions and Logging

4. Chapter 3: Managing User Logins

5. Chapter 4: Using File Contexts and Process Domains

6. Chapter 5: Controlling Network Communications

7. Chapter 6: Configuring SELinux through Infrastructure-as-Code Orchestration

8. Section 2: SELinux-Aware Platforms

9. Chapter 7: Configuring Application-Specific SELinux Controls

10. Chapter 8: SEPostgreSQL – Extending PostgreSQL with SELinux

11. Chapter 9: Secure Virtualization

12. Chapter 10: Using Xen Security Modules with FLASK

13. Chapter 11: Enhancing the Security of Containerized Workloads

14. Section 3: Policy Management

15. Chapter 12: Tuning SELinux Policies

16. Chapter 13: Analyzing Policy Behavior

17. Chapter 14: Dealing with New Applications

18. Chapter 15: Using the Reference Policy

19. Chapter 16: Developing Policies with SELinux CIL

20. Assessments

21. Other Books You May Enjoy

Chapter 15

Many Linux distributions add services and tools that fit the distribution's purpose and principles, yet which might be contradictory to what the reference policy is about. For instance, Red Hat Enterprise Linux and its derived Linux distributions will enable unconfined domains for many applications, whereas the reference policy will strive toward confinement of all applications.
As a result, many Linux distributions base their policy on the reference policy, but augment and adjust it for their specific purpose.
The three main policy files are the following:
- A type enforcement file, with the suffix .te, which contains the rules for the SELinux policy module, focusing on its owned domains.
- An interface file, with the suffix .if, which exposes the interaction patterns and privileges vis-à-vis the domains and resources owned by this SELinux policy module. These interfaces are then used by other SELinux policy modules.
- A context file, with the suffix .fc...