The post to which I linked above explains all this - how to get the address from Command then how to enter it into Internet Explorer to get into the settings menus in the router. Go into IE and try entering 192.168.0.1 into the address bar. If that doesn't bring up the login page, try 192.168.1.1. At login, use admin as the login name and password as the password. The wireless security key iwll be in the Wireless menu - sometimes called WLAN.