I need a bit more details: Are you trying to run the game client and server on the same machine?
For the accessibility ports, you need both the ports to be open (using the correct protocol, usually the simplest is to allow BOTH UDP and TCP), but also all the firewalls (on the machine but also on the router in case there’s one active) allowing access on these ports.
If the port check is red, don’t even bother, that will not work.
Also be aware that some ISP (I know of at least one in the Philipines) are putting multiple customers on the same IP and use some black magic using tricked out ports to give back internet traffic to the right people, on this type of setup it is generally not possible to do port forwarding.