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ZyWALL USG 100/200 Series User’s Guide
303
CHAPTER 15
DDNS
15.1 DDNS Overview
Dynamic DNS (DDNS) services let you use a domain name with a dynamic IP address.
15.1.1 What You Can Do in the DDNS Screens
• Use the DDNS screen (see Section 15.2 on page 304) to view a list of the configured
DDNS domain names and their details.
• Use the DDNS Add/Edit screen (see Section 15.2.1 on page 305) to add a domain name to
the ZyWALL or to edit the configuration of an existing domain name.
• Use the DDNS Status screen (see Section 15.2 on page 304) to view the status of the
ZyWALL’s DDNS domain names.
15.1.2 What You Need to Know About DDNS
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.
" 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 100 Network > DDNS
DDNS SERVICE
PROVIDER
SERVICE TYPES SUPPORTED WEBSITE NOTES
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 Chinese website