In order to open TelemetryTV on your firewall, you will need to:
Open TCP Port 443 to the TelemetryTV servers on https://*.telemetrytv.com
☝️Please note: TelemetryTV does not support locking down to specific IP addresses or ranges of IPs as we use Content Delivery Networks that prohibit this.
Make sure your anti-virus software is configured to allow connections from the Desktop/Player applications to any https://*.telemetrytv.com servers.
TelemetryTV makes an HTTPS connection and then upgrades to a websocket to stream continuous data.
If you are using an advanced proxy tool and are still having issues after opening your Port 443 to https://*.telemetrytv.com, you may need to ensure that websockets are allowed on your network as well. This may appear as a 400 error with the error message "Error during websocket handshake". It may show up as a different error code as well.
To resolve this, check to ensure your proxy allows the use of websockets, and open your TCP Port 443 to wss://*.telemetrytv.com as well as https://*.telemetrytv.com.