Set up a Cast for Education network

This article is for administrators.

When you set up Google Cast for Education, it connects teacher and student devices so students can share their content wirelessly with the teacher

How devices connect

If all devices are on the same network:

  • Without a firewall—The extension establishes a direct connection between devices.
  • With a firewall—The extension tries to connect devices using tunneling. If the firewall prevents a direct connection, devices connect through Google servers.

If devices are on different networks—The devices connect through Google servers.

Note: The teacher and students need to be online, but they do not need to be on the same network.

Network requirements

Cast for Education uses the following URLs and ports:

  • *
  • *
  • *
  • Ports and IPs used by Firebase Cloud Messaging (FCM)
  • WebRTC—Cast for Education uses WebRTC, which works better if outbound UDP connections are allowed on the firewall for ports 1025–65535. You can specify the UDP ports for WebRTC connections in the Google Admin console (details below).

Step 1: Configure settings

Make sure these settings are turned on for teachers and students:

Step 2: Specify ports for WebRTC connections (Optional)

  1. Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in

  2. From the Admin console Home page, go to Devices.
  3. On the left, click Chrome management.
  4. Click User settings.
  5. Scroll down to the Network section and next to WebRTC UDP Ports, specify the ports.

    Cast for Education works better if connections are allowed on ports 1025–65535.

  6. At the bottom, click Save.

Send feedback

If you have difficulty setting up Cast for Education, please send feedback from a teacher or student device. Leave a comment on both Feedback and Report an issue so that we get both your reports.

  • Click Cast for Education "" and then Feedback. Enter text and click Submit.
  • Right-click Cast "" and then Report an issue.

    Note: If you don’t see Cast "", in the top-right corner of a Chrome Browser tab, click More "" and then Cast.

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