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Writing a Custom SELinux Policy

SELinux has a number of tools to alter policy without real knowledge of writing policy itself, but when we create our own custom daemons and processes, SELinux won't have default settings readily available for us to use. Instead, we'll have to use a combination of tools and troubleshooting to develop a custom policy so that your custom work can work. In this lab, we'll use `sepolicy`, `ausearch`, and `audit2allow` to create a policy, implement it, and then refine the policy through troubleshooting.

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Lab Info
Level
Intermediate
Last updated
Sep 21, 2025
Duration
30m

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Table of Contents
  1. Challenge

    Generate Policy

    Create a base policy for the apachelogger daemon.

  2. Challenge

    Troubleshoot Policy

    Apply the generated policy, then review SELinux logs to see if any parts of the daemon are blocked by the new policy. Rewrite the policy to allow the appropriate access.

  3. Challenge

    Reapply Policy

    Reapply the adjusted policy and ensure there are no errors.

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