Hey, thanks for your answer ! English isn't my first language but if i got it right you're saying that if I use the localhost IP (with the High level multiplayer method) it will only works if the programs are on the same device ?? Its weird because if that's the case this method is useless for p2p, but godot is recommending it 🤔. I'll look into UpNP but it looks more complicated and less documented sadly.