Book Image

SELinux System Administration. - Second Edition

Book Image

SELinux System Administration. - Second Edition

Overview of this book

Do you have the crucial job of protecting your private and company systems from malicious attacks and undefined application behavior? Are you looking to secure your Linux systems with improved access controls? Look no further, intrepid administrator! This book will show you how to enhance your system’s secure state across Linux distributions, helping you keep application vulnerabilities at bay. This book covers the core SELinux concepts and shows you how to leverage SELinux to improve the protection measures of a Linux system. You will learn the SELinux fundamentals and all of SELinux’s configuration handles including conditional policies, constraints, policy types, and audit capabilities. These topics are paired with genuine examples of situations and issues you may come across as an administrator. In addition, you will learn how to further harden the virtualization offering of both libvirt (sVirt) and Docker through SELinux. By the end of the book you will know how SELinux works and how you can tune it to meet your needs.
Table of Contents (16 chapters)
SELinux System Administration - Second Edition
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface

Chapter 7. D-Bus and systemd

System-controlling services such as D-Bus and systemd are core components of a Linux system, now more than ever. Where D-Bus offers system- and session-wide cross-service communication and process life cycle management, systemd is a core daemon offering multiple features. Both services use SELinux to further harden their operations, and allow administrators to fine-tune the access controls applicable.

In this chapter, we will learn about:

  • SELinux's policy implementation for D-Bus and systemd

  • Tuning service access controls on D-Bus

  • Handling access permissions for services

We will end the chapter with an explanation of how D-Bus can use SELinux as its policy source for tightening the authorizations on its services.