[Bug?] Cant host, what is the autp port it uses? and why does LAN use a port num?

Hey Daphonic, I think I can help cuz I just got over the same issue.  You need to create another profile and log in as that one.  Give that a shot and let us know how it turns out.

Update, after staring at the screen for 30 min, figured out it reset my profile back to defualt, and will not let you join any games under the defualt profile, so that bad was on me.

Thank you so much.  I got this same error and thought I had some crazy firewall.  Tried DMZ and other stuff... all because default profile was select.

to answer the question in the thread title:

every tcp/udp game uses a port number. no matter if it is internet or LAN (which is, technically, the same anyway).

the difference is, in a LAN environment you can send out "discovery" packets, they are broadcasted to all computers in a lan. if a host is open, it can respond and tell the client the port number the game runs on. so the user doesn't need to know the port. but still, the game uses one (or more) port(s) to handle connections.