Currently we have our wireless network setup with WPA and only the IT department have the code. We enter all the code in to every computer which belongs to the organization. The organization consist of Windows XP and Windows 7 computers. Our domain controller is running windows 2008. We noticed that other devices that do not belong to the organization are also connected to the wireless network.
Any suggestion on how I can secure the wireless connection so if a user somehow get a hold of the wireless key, they are still require some kind of authentication before they have access to the network?
We have a public and and private SSIDs.