ZyXEL Communications 200 Series User Manual

Chapter 15 DDNS

ZyWALL USG 100/200 Series User’s Guide

The following table describes the labels in this screen. 

Table 102   Network > DDNS > Add

Enable DDNS 
Profile

Select this check box to use this DDNS entry.

Profile Name

When you are adding a DDNS entry, type a descriptive name for this DDNS entry in 
the ZyWALL. You may use 1-31 alphanumeric characters, underscores(

_

), or 

dashes (-), but the first character cannot be a number. This value is case-sensitive.
This field is read-only when you are editing an entry.

DDNS Type

Select the type of DDNS service you are using. 

Username

Type the user name used when you registered your domain name. You can use up 
to 31 alphanumeric characters and the underscore. Spaces are not allowed.
For a Dynu DDNS entry, this user name is the one you use for logging into the 
service, not the name recorded in your personal information in the Dynu website.

Password

Type the password provided by the DDNS provider. You can use up to 64 
alphanumeric characters and the underscore. Spaces are not allowed.

DDNS Settings

Click Advanced to display more settings. Click Basic to display fewer settings.

Domain name

Type the domain name you registered. You can use up to 255 characters.

Primary Binding 
Address 

Use these fields to set how the ZyWALL determines the IP address that is mapped 
to your domain name in the DDNS server. The ZyWALL uses the Backup Binding 
Address if the interface specified by these settings is not available. 

Interface

Select the interface to use for updating the IP address mapped to the domain 
name. Select Any to let the domain name be used with any interface.

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 Primary Binding Address 
Interface field.
Auto - If the interface has a dynamic IP address, 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.

Backup Binding 
Address 

Use these fields to set an alternate interface to map the domain name to when the 
interface specified by the Primary Binding Interface settings is not available.

Interface

Select the interface to use for updating the IP address mapped to the domain 
name. Select Any to let the domain name be used with any interface. Select None 
to not use a backup address.