@KimcheeGUN The controller is linked to my TP Cloud ID using the built-in feature in the controller settings, which doesn't specify whether the IP or domain is used. I do have an A record pointing to...

I run my own Omada SDN Controller v5.12.7 in a Linode VPS, with a firewall configured on the VPS to allow only the ports needed per TP-Link's documentation, and only from the IPs of the networks...