Look up and research if your router offers MAC filtering. On all the units I've encountered, I can set the WAP/Router to only let specific MAC addresses to use the WAP/Router.
I have just purchased a dlink G604T for my home network. All the machines are Windows XP SP1 and I have 1 notebook with built in wireless. The router is all set up and working fine, I started by accepting the defaults and getting it going.
I am now trying to make it more secure but the help gives no detail about what the settings do or how to configure. I have been able to disable broadcasting of the SSID and change its name. I have also enabled WEP and given it a 128bit ascii key with authentication set to open system. I have read enough to know that this should help increase my security. I was wondering what shared authentication as opposed to open means and if there is anything else I should do and if WPA should or even could be set up.
I have been able to get it all going happily and quite pleased with myself so far. Any tips appreciated.