i have one setup.
basically you need a WAP and the wireless cards. Then on the router you set a WEB key then encode. you have 3 options for encriptyon there and you will encode it at the level of security you want. then when you install the cards you will select the same key and encode it the same way you encoded it on the WAP. your wireless will still be visible but not acessible. ohh and btw i use linksys
__________________
|