I'm trying to set up a little Spiggot server (because I don't want to use Vanilla) for my friend and I to play on, but I keep having issues when they try to connect. It lets me connect to it using my IPv4 address, followed by ':25566' because that's what I've changed the port to. However, when my friend enters my IP followed by ':25566', it just says that they can't connect. I've watched multiple videos on port forwarding and I got it to work with my old internet. If you know what's preventing my friend from being able to join as far as what I've done wrong with port forwarding or the server itself, please let me know. :D (I have an AT&T U-verse router, Motorola NVG589)
Some screenshots:
Some screenshots: