UAG4100 User’s Guide
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H A P T E R
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DDNS
14.1 DDNS Overview
Dynamic DNS (DDNS) services let you use a domain name with a dynamic IP address.
14.1.1 What You Can Do in this Chapter
• Use the
DDNS
screen (see
) to view a list of the configured DDNS
domain names and their details.
• Use the
DDNS Add/Edit
screen (see
) to add a domain name to the
UAG or to edit the configuration of an existing domain name.
14.1.2 What You Need to Know
DNS maps a domain name to a corresponding IP address and vice versa. Similarly, dynamic DNS
maps a domain name to a dynamic IP address. As a result, anyone can use the domain name to
contact you (in NetMeeting, CU-SeeMe, etc.) or to access your FTP server or Web site, regardless of
the current IP address.
Note: You must have a public WAN IP address to use Dynamic DNS.
You must set up a dynamic DNS account with a supported DNS service provider before you can use
Dynamic DNS services with the UAG. When registration is complete, the DNS service provider gives
you a password or key. At the time of writing, the UAG supports the following DNS service
providers. See the listed websites for details about the DNS services offered by each.
Note: Record your DDNS account’s user name, password, and domain name to use to
configure the UAG.
After, you configure the UAG, it automatically sends updated IP addresses to the DDNS service
provider, which helps redirect traffic accordingly.
Table 79
DDNS Service Providers
PROVIDER
SERVICE TYPES SUPPORTED
WEBSITE
DynDNS
Dynamic DNS, Static DNS, and Custom DNS
www.dyndns.com
Dynu Basic,
Premium
www.dynu.com
No-IP No-IP
www.no-ip.com
Peanut Hull
Peanut Hull
www.oray.cn
3322
3322 Dynamic DNS, 3322 Static DNS
www.3322.org