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SELinux System Administration

You're reading from   SELinux System Administration Effectively secure your Linux systems with SELinux

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Product type Paperback
Published in Dec 2016
Publisher Packt
ISBN-13 9781787126954
Length 300 pages
Edition 2nd Edition
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Author (1):
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Sven Vermeulen Sven Vermeulen
Author Profile Icon Sven Vermeulen
Sven Vermeulen
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Table of Contents (11) Chapters Close

Preface 1. Fundamental SELinux Concepts FREE CHAPTER 2. Understanding SELinux Decisions and Logging 3. Managing User Logins 4. Process Domains and File-Level Access Controls 5. Controlling Network Communications 6. sVirt and Docker Support 7. D-Bus and systemd 8. Working with SELinux Policies 9. Analyzing Policy Behavior 10. SELinux Use Cases

Getting help with denials

On some distributions, additional support tools are available that help us identify the cause of a denial. These tools have some knowledge of the common mistakes (for instance, setting the right context on application files in order for the web server to be able to read them). Other distributions require us to use our experience to make proper decisions, supporting us through the distribution mailing lists, bug tracking sites, and other cooperation locations, for example, IRC.

Troubleshooting with setroubleshoot

In Fedora and RHEL, additional tools are present that help us troubleshoot denials. The tools work together to catch a denial, look for a plausible solution, and inform the administrator about the denial and its suggested resolutions.

When used on a graphical workstation, denials can even result in popups that ask the administrator to review them immediately. Install the setroubleshoot package to get this support. On servers without a graphical environment...

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