ZyXEL Communications 91-009-073003B DDNS, 16.1 DDNS Overview, 16.1.1What You Can Do in this Chapter, 16.1.2What You Need to Know

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DDNS

16.1 DDNS Overview

Dynamic DNS (DDNS) services let you use a domain name with a dynamic IP address.

16.1.1What You Can Do in this Chapter

•Use the DDNS screen (see Section 16.2 on page 316) to view a list of the configured DDNS domain names and their details.

•Use the DDNS Add/Edit screen (see Section 16.2.1 on page 318) to add a domain name to the ZyWALL or to edit the configuration of an existing domain name.

16.1.2What 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 89 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

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ZyWALL USG 50 User’s Guide