I have no idea what have I done wrong... I read some other's ppl threads but I can't find a solution that fits me... I have tried using this site: https://www.ipfingerprints.com/portscan.php and it says: Host is up. PORT STATE SERVICE 25565/tcp filtered minecraft So I think the port is open (? not sure) There is no other Java process running at the same time (maybe it is not java related programs that is causing this this issue? how can I check?) Maybe it is firewall related? (cause in firewall I don't understand anything) Well, I am confused and again I have no idea what to do. Your help would be much appreciated.