@Yverneas I have not done the first 3 suggestion steps, but I did type in the custom IP into the console and I was able to join. I am still not able to login regularly, though I am able to login using the custom IP.
I am new to this game. Just registered and all, but I try to login in game and it says "Login failed retrying...." then repeats message. I am able to login on the Dashboard, but not the game.