According to their docs Cloudflare won’t connect to your origin servers with HTTP/2 or HTTP/3 anyway: https://support.cloudflare.com/hc/en-us/articles/200168076

According to their docs Cloudflare won’t connect to your origin servers with HTTP/2 or HTTP/3 anyway: https://support.cloudflare.com/hc/en-us/articles/200168076-Understanding-Cloudflare-HTTP-2-and-HTTP-3-Support https://support.cloudflare.com/hc/en-us/articles/200168076-U... In general connections between CDNs/reverse proxies and origin servers don’t get much benefit from HTTP/2 or HTTP/3. CDNs don’t generally care about connection establishment speed or multiplexing to the origin (the main benefits of newer HTTP versions), since they can just create and maintain N long-lived connections if they want to be able to send N concurrent requests. They generally only bother with HTTP/2 to the origin if they need to support gRPC, which has some unusual connection semantics.