Want to see who is on your wireless? SoftPerfect’s WiFi Guard is freeware that scans your network, both wireless and wired and it also inventories connections on your network.
Before setting up WiFi Guard, inventory your computers, printers, routers, TVs and other devices that use your network. Get each devices’ MAC address. Load WiFi Guard and mark each device as trusted. WiFi Guard’s settings allows you to set a scan interval and to put comments on devices that you know. In the event a new device is connected to your network, you’ll be alerted.
WiFi Guard keeps a history of devices that connect to your network.