How to turn on Firewall in Plesk Login to Plesk Click on Tools & Settings. Click on Firewall in the main section of Security. The system will be on Switch off, press Switch on at all. 168Private Hosting (Plesk)Related Knowledge Base Posts -How to Update the PHP version on the Plesk Server?How to order Private Hosting server with Plesk Panel?How to install SSL on Private Hosting (Plesk Server)?