Hi, I have an ISP-issued Nokia ONR that cannot be changed to bridge mode, and an AX56U connected to that. Because of the double NAT problem, I cannot use AiCloud features on the ASUS router. The ONR supports DDNS (e.g. test1.sds-de.ip) so I thought setting that up and port forwarding to the ASUS router (e.g. test1.sds-de.ip:8443) would allow access (to at least the local FTP server or WebGUI) but that doesn't seem to be the case. Any help is appreciated.