You must register your Amazon device (Echo, Echo Dot, Fire TV, etc.)'s hardware address before it can communicate over the Stanford network. Here's how to find it:
AMAZON ECHO/ECHO DOT
AMAZON FIRE TV
1. From the Home screen, press Menu.
2. Select Settings.
3. The Wi-Fi MAC Address is located toward the bottom of the screen in the Device Info section.
Once you've located the hardware address for your device, you can register it following the instructions for Connecting your streaming media player.