Hello. So I've spent the last couple weeks trying to figure out how to set up a minecraft multiplayer server with absolutely no tech experience. I got it running, so that my sister and I can play on our home network, but my cousins who live in another state cannot connect. My sister says she cannot connect when she is on a different wifi than my computer. I've already found both the external and internal ip addresses; I have already port forwarded to 25565. I just do not know why they cannot connect from another router.