I’ve been using Emby with Cloudflare for a year or two, I’ve had no problem until I upgraded my USG 4 to the UDM Pro all the rules are the same its an exact copy and works fine. I updated my IP address in cloud flare and that should have been that however. If I turn on proxy I can no longer access the emby server via external IP or Domain name. But if I turn off proxy mode after a few mins the Domain name works fine. I used to have to put the ports on the end to access the server. But when I first set up Cloudflare for some reason I didnt need to. The emby ports are 8920 as I mentioned it was working perfectly fine and had been for a long time. I can’t find too much on online about my particulure set up. Any help or advice would be great!