# Installing Database Role
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To run the database role on a server allow port 3306 on your firewall.
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We recommend installing the Database role on each of your Application servers.
To add a Database role to a server:
- Click Servers in the left side bar
- Choose the server that you want to add the backup role to
- Click Add role and select the Database check box
- Select your preferred database kind and version (MySQL 8.0 - 8.1 or MaridaDB 10.0 LTS and 11.00)
WARNING
It is not possible to change the database kind at a later date.
- Click Add role to finish
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You can navigate away from the server page when a service is being installed and you will be notified when the installation is completed.