US Robotics Wireless 54Mbps ADSL Router User Manual page 59

DDNS
Dynamic DNS (DDNS) provides users on the Internet with a way to tie
their domain name to a computer or server. By enabling this, your
domain name will be linked to your IP address so that if your IP
address changes, your DNS records will be automatically updated
with the new location without any effort on your part. (This is done by
a DDNS provider.)
If you enable this feature, you will need to select a DDNS provider
and enter the site's Domain Name, your account or e-mail address,
and your password or key. When finished, click SAVE SETTINGS.
Tools
Use the Tools menu to back up the current configuration, restore a
previously saved configuration, restore factory settings, update
firmware, and reset the Wireless 54Mbps ADSL Router.
Configuration Tools
Select a function and click Next.
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