Use nslookup command to check if your DDNS is enabled. You need to
change xx5007c.glddns.com to your DDNS url when use nslookup command.
nslookup xx5007c.glddns.com 8.8.8.8
The output above means the DDNS url has maped to a IP address.
4) HTTP 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 80.
Follow the steps above, to enable HTTP Remote Access.