I keep getting an unknown devise listed on the WiFi Guard and I cannot identify or eliminate it. I have tried reject filtering the MAC address on my ASUS RT-N56U wireless router, but it has no effect. I tried both reject filter mode with just that MAC address and accept only filter mode with all but that address and it still connects to my router and shows up on the WiFi Guard. I have tested reject mode on other devices and they drop off the list, but this one never does. I have a wireless Brother printer that has the same wireless device manufacturer, but when I turned off that printer, it dropped off the list, but the unknown device did not. Any idea what this devise is and why I cannot MAC filter it? I have WPA2 and AES protection, so I can't figure our how some unknown device is still showing up.