- Plesk for Linux
The extension Plesk Firewall is installed on a Plesk server.
Firewall rules management is enabled in it in Tools & Settings > Firewall > Enable Firewall Rules Management.
Firewall rules which were added manually in the server console using the utility
All custom firewall rules are replaced with the rules defined in Plesk Firewall in Tools & Settings > Firewall.
Go to Tools & Settings > Firewall.
Add custom rules as described in Plesk Administrator's Guide.
Alternatively, custom rules can be added using CLI as described in the article How to manage Plesk Firewall via CLI?