My connection is a type of connection with private ip, so it's like behind a router of firewall and normally i can't host for the people that have not my type of connection.
In Kaillera I can connect in public server cause i am a "client"....but i got a strange error (not only I but everyone is behind a router or similar) that when a server is near full u can't enter the server even the name apperaed in channel.
