use hamachi. its simple. Go to google and download hamachi once it is installed make a network for ex:user esquilla13 pass 12345
then the IP will be given to you by hamachi use them and put those @ char_eathena.conf and map_eathena.conf
Then your screwed. Try using hamachi ? It can help you if you dont have any router . but It sucks though you need people to download the "HAMACHI" just to get into the server.