A set-top box (STB) is disclosed. The STB includes a network interface to send signals to and receive signals from a network. The STB also includes a tuner to send a display signal to a display device based on a signal received by the STB. The STB also includes a user interface display module to send a user interface display to the display device and to receive user input. The STB also includes a diagnostic module to generate a network diagnostic command and to send the network diagnostic command to a first network device. The network diagnostic command is configured to solicit a response from the first network device. The diagnostic module is configured to determine a status of a network connection from the STB to a remote network device based on the network diagnostic command and the response received from the first network device.