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 5. Controlling Network Communications

The SELinux mandatory access controls go much beyond its file and process access controls. One of the features provided by SELinux is the ability to control network communications. By default, the socket-based access control mechanism is used for general network access controls, but more detailed approaches are also possible.

In this chapter, we will:

  • Learn how network access controls are governed by SELinux

  • Cover what administrators can do to further strengthen network communications using iptables

  • Describe how SELinux policies can be used for cross-system security through labeled IPsec

We'll finish the chapter with an introduction to CIPSO labeling and its integration with SELinux.