To do this just type 192.168.1.1 into the address bar on a hardwired computer, and it should open up a configuration page for your router. A user name and password may be required. They may be ones you set or default ones, if you remember setting them then use them, but if you don't Google the default password for your router model. In the next pages that show up the key should be buried in there somewhere, its different for every router. Google it.