User manual

ZyWALL USG 300 User’s Guide
407
CHAPTER 18
DDNS
18.1 DDNS Overview
Dynamic DNS (DDNS) services let you use a domain name with a dynamic IP
address.
18.1.1 What You Can Do in this Chapter
•Use the DDNS screen (see Section 18.2 on page 408) to view a list of the
configured DDNS domain names and their details.
•Use the DDNS Add/Edit screen (see Section 18.2.1 on page 410) to add a
domain name to the ZyWALL or to edit the configuration of an existing domain
name.
18.1.2 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 ZyWALL. When registration is
complete, the DNS service provider gives you a password or key. At the time of
writing, the ZyWALL supports the following DNS service providers. See the listed
websites for details about the DNS services offered by each.
Table 102 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