Hey,
Ioday I tried to activate DDNS as base of an VPN-Connection. I activated DDNS in Applications and I got a Hostname, but if I click on DDNS Test the result is a message like:
The IP from DDNS domain resolution is not the same as the WAN IPs of the device. You need an Internet Public IP address to use the Dynamic DNS. If this router is behind NAT, you may need to set up port forward in your ISP router. If you have VPN Client enabled, please disabled "Services from GL.iNet Use VPN" in the global options.
Just for Information: I have a public IP address from my mobile provider O2 and my router is not behind any other device.
BR
ETHVH