ZyXEL Communications 200 Series User Manual

ZyWALL USG 100/200 Series User’s Guide

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

• 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 ZyWALL or to edit the configuration of an existing domain name.

• Use the DDNS Status screen (see 

) to view the status of the 

ZyWALL’s DDNS domain names.

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

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