At “Service type“, select a DDNS service provider from the dropdown box.
At “Interface to monitor“, specify an interface (typically the WAN).
Even with DDNS, it can take several minutes for the changes to propagate to other DNS servers.The client will automatically update the dynamic host each time the WAN IP changes or every 25 days.You probably want to make sure your client is connecting to the service, since some providers will remove inactive hosts if they have not been updated for 30 days.Depending on the provider, the hostname is registered with a domain owned by the provider or the customer’s own domain name.
These services can function by a number of mechanisms. The provider might use RFC 2136 to update the DNS servers (more on RFC 2136 later).
That’s right, you would not be seeing Dynamic DNS settings in Fortigate Forti OS 5 or 5.2 (5.2.1) for other DDNS providers than Fortinet.