- Lab
-
Libraries: If you want this lab, consider one of these libraries.
- Cloud
- Security

SELinux Learning Activity
In this lab we'll use SELinux to resolve a scenario that is common in the real world. Doing this will help to understand the tools available and where to look when troubleshooting SELinux issues. *This course is not approved or sponsored by Red Hat.*

Lab Info
Table of Contents
-
Challenge
Fix the Selinux Permissions on `/opt/website` so That They'll Survive a Relabel
- First we'll check to see what the label needs to be. Websites are normally stored in
/var/www/html
so we can look there to see what it should be. - We can see that the context should be set to
httpd_sys_content_t
. - The command we need to run is: semanage fcontext -a -t httpd_sys_content_t '/opt/website(/.*)?'
- This makes a change in the SELinux database.
- We then need to run
restorecon /opt/website
to actually make the change on the filesystem. - This will set the directory to the correct context and protect that change from a relabel in the future.
- First we'll check to see what the label needs to be. Websites are normally stored in
-
Challenge
Deploy the Website as Instructed and Test It
- We've been instructed to deploy the website by running
mv /root/index.html /opt/website/
. - We can then try a
curl localhost/index.html
to test our deploy. - If we get a
403 Forbidden
error, test if SELinux is the problem by runningsetenforce 0
and then running curl again. - If the
curl
works with SELinux in permissive mode, we can set it back to enforcing withsetenforce 1
and then investigate why.
- We've been instructed to deploy the website by running
-
Challenge
Resolve the Error When Trying to Access `/opt/website/index.html`
ls -lZ /opt/website
will show thatindex.html
has a content type of admin_home_t which isn't what we need when serving webpages.- We can run
restorecon /opt/website/index.html
to fix this error and the curl will work.
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