Click on Tools and settings (Sometimes under the tab ‘Server’)

Select Firewall under security

Click on ‘Edit firewall configuration’

Here you will see a list of your rules. Click on ‘Add a custom rule’.

Here you can specify the criteria for the new rule.

1. Name the rule - this can be anything you like.
2. Match direction - This is whether you want this rule to apply to incoming or outgoing connections.
3. Action - Set this to allow to allow the traffic or deny to block the traffic.
4. Ports - You can enter the port number(s) and the protocol eg TCP or UDP here.
5. Sources – Specify the IP address that the rule will be active on. Leaving this blank will all the rule on all IPs

Once you have added the rule you will see it at the top of the rules list. All you need to do now is click ‘Apply configuration’ to enable the new rules.