I can't join into the server, i had no problem hosting server, but i can not go in to the server. My network isn't that bad. it even had no problem playing games like lol or overwatch. If there is solution that you know, tell me plz...
if you are trying to join on the same network as the host (both computers are in the same house), you must use the servers "local" IP, instead of the public IP the server gives you. If you don't know how to find your local IP, tell me your OS (windows, linux, mac, etc...) and I'll guide you through it.