Configure Dynamic DNS 
Use the Setup Advanced Settings -  Dynamic DNS page to configure the Dynamic 
Domain Name Service (DDNS). This service provides the residential gateway that 
has a variable and frequently changing IP address with a well known host name 
resolvable by network applications through standard DNS queries. If you have a 
fixed IP address, you don't need to use DDNS. It is useful when you are hosting your 
own website, FTP server, or other server behind the device. Before using this feature, 
you need to sign up for DDNS service at a supported DDNS service provider. 
 
Setup Basic Settings - Dynamic DNS Page 
The following illustration is an example of the Setup Basic Settings - Dynamic DNS 
page.