IP -> firewall
https://help.yeastar.com/en/k2/topic/set-up-port-forwarding-on-mikrotik-router.html
quick set -> port setting (woh, this is wrong)
issue for quick set: It will do dst-nat to all of packets coming from wan to lan AND from lan to wan. If you will add rule to port forward tcp:80 to 192.168.88.99:80, it will break all connections from lan to wan:80. It is because of in-interface or in-interface-list is not added
the fix: in-interface is specified in the following video, check other forwarding rules to clarify the in-interface
fortinet basic configuration, voip policy