If Plesk Firewall is enabled, rules manually added in CLI are removed

Symptoms

• Firewall rules which were added manually in the server console using the utility iptables are removed.
• The extension Plesk Firewall is installed on a Plesk server. and enabled via Tools & Settings > Firewall > Enable Firewall Rules Management.

Cause

All custom firewall rules are replaced with the rules defined in Plesk Firewall in Tools & Settings > Firewall as per design.

Resolution

1. Log into Plesk.
2. Go to Tools & Settings > Firewall.
3. Add custom rules as described in Plesk Administrator's Guide.