After you enable HTTP Remote Access, you can access Admin Panel anywhere
by your DDNS url of http, e.g. http://xxxxxxx.glddns.com. If you use port forward, you
should be access like http://xxxxxxx.glddns.com:YourExternalPort.
5) HTTPS Remote Access
This function requires a public network IP.
If your router is behind NAT, you may need to set up port forward in higher level
router. It use port 443.
This function use self-signed certificates, so the browers will indicate that "Your
connection is not private". I will show you how to use it anyway on Chrome iOS.
Other browers are the similar process.