User Device Tracker should have a feature that allows administrators to detect and profile unauthorized devices. MAC OUIs, DHCP fingerprinting , and ActiveSync could be used to profile devices. An example would a end user that brings a Linksys Router from home. When this device is plugged into a switchport Device Tracker would profile the device as a unauthorized wireless router and a alert would be sent to the Admin with device's classification, manufacturer, and the switchport the device is connected to.