Also, make sure the 25565 is UDP/TCP. And that your port is open on the right private port which is found at the end of your IPv4 address. Like my IPv4 is 192.168.2.5. The ".5" is the private port, there should be an option to put that in where your port forward. If YOU are having issues connected, if you're hosting it, make sure the ip address for you is localhost.