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Mastering Linux Network Administration

You're reading from   Mastering Linux Network Administration Master the skills and techniques that are required to design, deploy, and administer real Linux-based networks

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Product type Paperback
Published in Nov 2015
Publisher Packt
ISBN-13 9781784399597
Length 260 pages
Edition 1st Edition
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Author (1):
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Jay LaCroix Jay LaCroix
Author Profile Icon Jay LaCroix
Jay LaCroix
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Table of Contents (12) Chapters Close

Preface 1. Setting up Your Environment FREE CHAPTER 2. Revisiting Linux Network Basics 3. Communicating Between Nodes via SSH 4. Setting up a File Server 5. Monitoring System Resources 6. Configuring Network Services 7. Hosting HTTP Content via Apache 8. Understanding Advanced Networking Concepts 9. Securing Your Network 10. Troubleshooting Network Issues Index

Understanding SELinux


Security Enhanced Linux (SELinux) is a kernel module intended to increase security by enforcing the Mandatory Access Control. This concept gives you the control to ensure that users and applications are only able to access the things that they absolutely need to in order to complete the tasks they are designated to perform. While firewalls help protect the system against intrusion from the outside, SELinux helps prevent resources on the inside from doing things that they aren't supposed to be doing. This may sound vague, because it is how SELinux is used, and how you can benefit from it depends solely on how you implement it. Want to prevent a user from making a very private file world-readable? Sure, you can do that. Perhaps ensure Apache cannot access files outside of /var/www? You can do that too. Without SELinux, you would be relying solely on group and user permissions. SELinux helps you put more granular security restrictions in place by adding an additional...

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