Any chance the list of remote ip addresses that plex may use to connect to the server instance could be updated to include ipv6? After allowing the ips listed per the below, remote access is blocked, and logs show requests are coming from ipv6 addresses.
I’m getting a big sad about this - this was flagged eight years ago when the first large-scale rollouts of DS-Lite started in Germany, we’re now at the point where hundreds of millions of residential users all over the world can only host over IPv6 since their v4 is now behind CG-NAT, and Plex is one of the few server applications where most of the functionality that makes things work automatically over IPv4 doesn’t work over IPv6. The forums and subreddit are now full of crazy complex VPN workarounds to keep making things work over IPv4, tutorials how to construct the *.plex.direct URL manually, and I’m sure your Plex Relay servers are racking up some serious bandwidth bills.