PLANET ICA-HM120 - Manual (Page 42)

3.5.2. DDNS server
Stands for Dynamic Domain Name Server
The device supports DDNS If your device is connected to xDSL directly, you might need this
feature. However, if your device is behind a NAT router, you will not need to enable this feature.
Because DDNS allows the device to use an easier way to remember naming format rather than an
IP address. The name of the domain is like the name of a person, and the IP address is like his
phone number. On the Internet we have IP numbers for each host (computer, server, router, and
so on), and we replace these IP numbers to easy remember names, which are organized into the
domain name. As to xDSL environment, most of the users will use dynamic IP addresses. If users
want to set up a web or a FTP server, then the Dynamic Domain Name Server is necessary. For
more DDNS configuration, please consult your dealer.
Your Internet Service Provider (ISP) provides you at least one IP address which you use to
connect to the Internet. The address you get may be static, meaning it never changes, or dynamic,
meaning it’s likely to change periodically. Just how often it changes, depends on your ISP. A
dynamic IP address complicates remote access since you may not know what your current WAN
IP address is when you want to access your network over the Internet. The solution to the dynamic
IP address problem comes in the form of a dynamic DNS service.
The Internet uses DNS servers to lookup domain names and translates them into IP addresses.
Domain names are just easy to remember aliases for IP addresses. A dynamic DNS service is
unique because it provides a means of updating your IP address so that your listing will remain
current when your IP address changes. There are several excellent DDNS services available on
the Internet and best of all they’re free to use. One such service you can use is www.DynDNS.org.
You’ll need to register with the service and set up the domain name of your choice to begin using it.
Please refer to the home page of the service for detailed instructions or refer to Appendix E for
more information.
41