How to install the Plesk Firewall component?
In Plesk for Windows Server, Plesk Firewall comes pre-installed. Plesk Firewall appears under the Security section in Tools & Settings.
To install Plesk Firewall in Plesk for Linux, click on one of the following sections and follow the steps:
Installing Plesk Firewall via the Plesk interface
In Plesk, go to Tools & Settings > Updates and Upgrades.
Note: If Plesk Web Installer does not open, refer to the command-line instructions.
On the Updates and Upgrades page, click Add/Remove Components.
On the Add/Remove Components page, expand Plesk extensions and click Plesk Firewall > Install. Click Continue to begin the installation.
Click on the picture to enlarge
Installing Plesk Firewall via a command-line interface
Connect to a Plesk server via SSH.
Run the command:
# plesk installer --select-release-current --install-component psa-firewall