If you have a DSL or Cable service provider that changes your modem IP address periodically, Dynamic DNS (Domain Name Service), a method of keeping a domain
name linked to a dynamic IP address, is useful. With most Cable and DSL connections, you are assigned a dynamic IP address and that address is used only for the
duration of that specific connection. With the DCS-900, you can set up your DDNS service and the DCS-900 will automatically update your DDNS server every time it
receives a different IP address. Depending on the service, this update may take a few hours.
If you are using a DDNS connection, select Enable option and enter in your Host Name, User Name, and Password. After done the configuration, you may click Save