How to open ports on Qnap NAS?

Question

iptables

The situation is this:
There is a router on which ports (80,443,7443) are forwarded to the outside for qnas access via ddns from no-ip and letsencrypt certificate renewal, but they do not work if qnas has access only for certain ips - if you open access for all connections the ports are opened. On qnap - as I understand it is iptables. Actually the question is what needs to be written in iptables in order to open ports on qnas, because. Most of the options I've tried don't work?

Answer 1

Well, turn off access only from certain IPs (by editing iptables you will do the same)