I'll start by saying that I don't really understand much of anything about networking. My home wireless network was set up by a very knowledgeable guy that I used to work with (but, sadly, no longer do).
I have a Linksys Wireless-G router WRT54G and I recently updated the firmware. My home network typically consists of three machines: a desktop PC that I plug into the router, plus my husband's laptop and a PC in my son's room that connect wirelessly. So far so good, everything works smoothly.
This week my daughter brought her laptop home from college and wants to connect it wirelessly to our network. She has a Dell Studio laptop running Windows Vista. I don't know what kind of wireless adapter it has, but if you tell me how to find out, I'll do that. This machine can connect when it's plugged into the router but it has never been connected wirelessly to our home network.
My network is set up to allow only specific MAC addresses to connect. I did ipconfig/all on her machine to find out her MAC address---or what I hope is her MAC address. It's labeled as "Physical Address" under "Wireless LAN adapter Wireless Internet Connection" (the first object listed in the ipconfig results). I entered that address in the MAC Address Filter list of the Linksys router configuration utility and saved the changes.
When she tried to connect her laptop, she was prompted for the network SSID, which she entered. Then it asked for the passphrase, which she entered, but the passphrase was rejected. We tried several times and kept getting the same message, that the passphrase is invalid. Yet we were entering exactly the same passphrase that is shown on the Wireless Security page of the Wireless tab in the router configuration utility.
Any idea what we are doing wrong? Is there a step I'm missing besides entering her laptop's MAC address? Or did I enter the wrong numbers as the MAC address? ipconfig shows several objects and I wasn't completely sure which one was correct.
Thanks to whoever can help. And please keep in mind that I don't know what I'm doing, so go slow!