How to create a rule to close all ufw ports?

Question

iptables

Only the main ports for LAMP, sftp, samba are open on ufw.
How can I close all other ports? With the help of the rule, or what is better?

Answer 1

Quite simply. First you need to disable ufw:
Next, we define the default policy as "everything that is not allowed is prohibited":
Then we open the ports that are needed:
Turn ufw back on:
Everything.