Plesk firewall protects the server from attacks by controlling access to Plesk services (such as web hosting, mail hosting, and FTP). You can control the firewall configuration using rules and policies. The firewall allows you to: 
- Secure the server using default rules and policies.
- For even better protection, modify the default rules and policies, or create your own from scratch.

Read more about the Plesk firewall [on Linux](https://docs.plesk.com/en-US/current/administrator-guide/plesk-administration/the-plesk-firewall-linux.72046/) and [on Windows](https://docs.plesk.com/en-US/current/administrator-guide/plesk-administration/the-plesk-firewall-windows.64951/). 
