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

Summary


In this chapter, we started out with an introduction to systemd and a strong focus on the service management capabilities that systemd offers. We learned how to start a service with a custom SELinux context as well as how additional files can be properly labeled upon boot. Alongside the service management, through systemd's unit files, this chapter also covered transient services and how to immediately associate the right SELinux context.

Other systemd capabilities and services were touched upon as well. We saw how SELinux contexts are registered as part of the systemd journal and how to query for events using this context. Journal daemon integration with the SELinux troubleshooting daemon was covered as well. We learned how systemd supports containers and what administrators can do to fine-tune the SELinux context associated with the container. Finally, we took a brief look at udev and how its rules can be used to support administrators in managing devices. One of its actions is...