Hello, i got a problem when im trying to port forward a minecraft server, and it dosen't work. I checked if the port is open but it is not. I don't know how to fix, please help!

Hello sorry my bad english. I need your help 1. I have Deco E4 and use it as PPPoE with lasted FW Ony tplinkdns on setting When I use "name.tplinkdns.com" on Deco my client can't connect to my server