Cloudflare’s Mutual Authentication (TLS Client Authentication) creates a secure connection between an Internet of Things device and its origin. When a device attempts to establish a connection with its origin server, Cloudflare validates
the device’s certificate.
Successful IoT Device Authentication
If the device has a valid client certificate, like having the correct key to enter a building, the device is able to establish a secure connection.
Unsuccessful IoT Device Authentication
If the device’s certificate is missing, expired, or invalid, the connection is revoked and Cloudflare returns a 403 error.