Port wont open eventhough i already setup port forwarding on my router

Im trying to make a server on my old laptop for me and my friends but the port wont open.
i have setup port forwarding on my router to “25565” and input the correct LAN Host IP Address
i tried to create a default server profile it still wont open…

before trying to make a server on mineos, ive made a server using paper and official Minecraft server on my main pc and it work flawlessly the port is open whenever I start the server

Which method did you use to build the Mineos server? If you used the ISO, the port should be opened by default, if you installed it using the node-is on an existing ‘nix, the you’ll need to review the iptables (or equivalent) for that OS.