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Managing SELinux on RHEL 8

Security Enhanced Linux (SELinux), is an additional layer of system security, that enhances the other security mechanisms in RHEL 8. In this hands-on lab, we will examine SELinux at a high level, will set and check enforcing and permissive modes for SELinux, list and identify SELinux file and process context, restore default file contexts, use boolean settings to modify system SELinux settings, and diagnose and address routine SELinux policy violations on RHEL 8. *This course is not approved or sponsored by Red Hat.*

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Path Info

Level
Clock icon Intermediate
Duration
Clock icon 30m
Published
Clock icon Dec 04, 2020

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Table of Contents

  1. Challenge

    Diagnose a Reported Apache Server Issue

    1. Discover an Apache Server access issue.
    2. Attempt to start Apache and view status.
    3. Query the system journal for errors and issues.
    4. Test if the issue is SELinux-related.

  2. Challenge

    Troubleshoot Possible SELinux Errors Affecting Apache

    1. Re-enable SELinux and check the status.
    2. Investigate audit and other logs for errors.
    3. Discover the issue is related to the non-standard port.

  3. Challenge

    Create and Apply a Local Policy Module to Fix the Apache Issue

    1. Use ausearch and audit2allow to generate a local policy module.
    2. Investigate the generated policy module files.
    3. Apply the policy module.
    4. Test apache access.

  4. Challenge

    Clean Up any Additional SELinux-related Issues

    1. Check the logs again for errors.
    2. Find getattr issues for httpd files.
    3. Set context for the affected files.
    4. Test for any additional errors.
Pluralsight Skills - Labs - Pluralsight
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Pluralsight Skills

Pluralsight Skills gives leaders confidence they have the skills needed to execute technology strategy. Technology teams can benchmark expertise across roles, speed up release cycles and build reliable, secure products. By leveraging our expert content, skill assessments and one-of-a-kind analytics, keep up with the pace of change, put the right people on the right projects and boost productivity. It's the most effective path to developing tech skills at scale.

What's a lab?

Hands-on Labs are real environments created by industry experts to help you learn. These environments help you gain knowledge and experience, practice without compromising your system, test without risk, destroy without fear, and let you learn from your mistakes. Hands-on Labs: practice your skills before delivering in the real world.

Provided environment for hands-on practice

We will provide the credentials and environment necessary for you to practice right within your browser.

Guided walkthrough

Follow along with the author’s guided walkthrough and build something new in your provided environment!

Did you know?

On average, you retain 75% more of your learning if you get time for practice.
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