- Plesk for Linux
- Plesk for Windows
It is not possible to manage firewall Plesk rules for ports 21, 220, 143, 25, 110, 3389, 443, 23 and 80:
This is a Plesk bug #PPPM-9229 which is planned to be fixed in future Plesk updates.
Currently, there is no workaround to remove the rule.
It is possible to set the required policy for the port using following steps:
Access Tools & Settings > Firewall > click on the <rule name>.
Set Allow, Deny or Allow from selected sources option.