Thanks. I don't recall when I installed that script but I have it running on both of my Synology NAS boxes (both the local and remote).
I'm assuming that it's letting the traffic through as I can see the channel load in the originating CDVR server, but it only shows the connection for 5 seconds and then drops. And if I manually watch the channel through VLC and have an active stream going, then I can trigger through the CDVR->Threadfin->Tailscale->Plex connection and it will play, but id the VLC instance isn't working, then the Plex player won't initiate the channel.
I've checked CDVR and Threadfin logs, nothing useful is showing as far as I can tell. Will keep researching, but this is well above my technical knowledge, so not sure what else it may be.
Jay