# Installing Application Role
To run the Application role on a server allow port 80, 443, 22 and 21 on your firewall.
To add the Application role to a server:
- Click Servers in the left side bar
- Choose the server that you want to add the Application role to
- Click Add role and select the Application check box
- Select your web server type (Apache, LiteSpeed or OpenLiteSpeed)
- Complete the form and hit Add role
You can navigate away from the server page when a service is being installed and you will be notified when the installation is completed.
The Application role will not automatically be mapped to websites. If you are installing a role which did not previously exist on your Enhance estate and you want to map existing websites to it so they can use the new functionality, use the "Move server" option from the left hand menu.