Buffalo WBMR-HP-GN User Manual page 16

DDNS
If your Modem Router's Internet IP address is assigned dynamically and
you wish to host a Web site or other Internet service, you can sign up with
DynDNS.org or TZO.com for Dynamic DNS (DDNS) service.
Select your DDNS provider from this list box, enter the required information,
and click "Apply". The gateway will send its Internet IP address to the provider
so the provider can update your DNS entry.
For DDNS.org service, you must enter a user name, password, and host name.
For TZO.com service, you must fill in the correct e-mail address, password,
and domain name
Route
Network Address Translation (NAT) lets you use 'private' (and cost-free) IP
addresses on your LAN and a single 'public' IP address (which you must
pay for) on the Internet. When a local computer accesses the Internet, your
broadband modem router changes the source address from the computer's
to its own Internet IP address. When a response comes back, it changes the
destination address from its Internet IP address to the requesting computer's
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