ZyXEL Communications 100 Series User Manual

 Chapter 15 DDNS

ZyWALL USG 100/200 Series User’s Guide

The DDNS Status screen shows the status of the ZyWALL’s DDNS domain names. To access 
this screen, login to the web configurator. When the main screen appears, click Network > 
DDNS > Status. The following screen appears.

IP Address

The options available in this field vary by DDNS provider.
Interface -The ZyWALL uses the IP address of the specified interface. This option 
appears when you select a specific interface in the Backup Binding Address 
Interface field.
Auto -The DDNS server checks the source IP address of the packets from the 
ZyWALL for the IP address to use for the domain name. You may want to use this if 
there are one or more NAT routers between the ZyWALL and the DDNS server.

Note: The ZyWALL may not determine the proper IP address if 

there is an HTTP proxy server between the ZyWALL and the 
DDNS server.

Custom - If you have a static IP address, you can select this to use it for the 
domain name. The ZyWALL still sends the static IP address to the DDNS server.

Custom IP

This field is only available when the IP Address is Custom. Type the IP address to 
use for the domain name.

Enable Wildcard

This option is only available with a DynDNS account.
Enable the wildcard feature to alias subdomains to be aliased to the same IP 
address as your (dynamic) domain name. This feature is useful if you want to be 
able to use, for example, 

www.yourhost.dyndns.org

 and still reach your hostname.

Mail Exchanger

This option is only available with a DynDNS account.
DynDNS can route e-mail for your domain name to a mail server (called a mail 
exchanger). For example, DynDNS routes e-mail for 

john-

doe@yourhost.dyndns.org

 to the host record specified as the mail exchanger.

If you are using this service, type the host record of your mail server here. 
Otherwise leave the field blank.
See 

www.dyndns.org

 for more information about mail exchangers.

Backup mail 
exchanger

This option is only available with a DynDNS account.
Select this check box if you are using DynDNS’s backup service for e-mail. With 
this service, DynDNS holds onto your e-mail if your mail server is not available. 
Once your mail server is available again, the DynDNS server delivers the mail to 
you. See www.dyndns.org for more information about this service.

OK

Click OK to save your changes back to the ZyWALL.

Cancel

Click Cancel to exit this screen without saving.

Table 102   Network > DDNS > Add (continued)