ZyXEL 2WG Guida Utente

Chapter 22 DNS Screens

ZyWALL 2WG User’s Guide

Domain Name 1~5

Enter the host names in these fields. 

DDNS Type

Select the type of service that you are registered for from your Dynamic DNS 

service provider. 
Select Dynamic if you have the Dynamic DNS service. 
Select Static if you have the Static DNS service.
Select Custom if you have the Custom DNS service.

Offline

This option is available when Custom is selected in the DDNS Type field. 

Check with your Dynamic DNS service provider to have traffic redirected to a 

URL (that you can specify) while you are off line.

Wildcard

Select the check box to enable DYNDNS Wildcard.

WAN Interface

Select the WAN interface to use for updating the IP address of the domain 

name.

IP Address Update 

Policy

Select Use WAN IP Address to have the ZyWALL update the domain name 

with the WAN interface's IP address.
Select Use User-Defined and enter the IP address if you have a static IP 

address.
Select Let DDNS Server Auto Detect only when there are one or more NAT 

routers between the ZyWALL and the DDNS server. This feature has the DDNS 

server automatically detect and use the IP address of the NAT router that has a 

public IP address.

Note: The DDNS server may not be able to detect the proper IP 

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

HA

Select this check box to enable the high availability (HA) feature. High 

availability has the ZyWALL update a domain name with another interface’s IP 

address when the normal WAN interface does not have a connection. 
If the WAN interface specified in the WAN Interface field does not have a 

connection, the ZyWALL will attempt to use the IP address of another WAN 

interface to update the domain name.
When the WAN interfaces are in the active/passive operating mode, the 

ZyWALL will update the domain name with the IP address of whichever WAN 

interface has a connection, regardless of the setting in the WAN Interface field.
Disable this feature and the ZyWALL will only update the domain name with an 

IP address of the WAN interface specified in the WAN Interface field. If that 

WAN interface does not have a connection, the ZyWALL will not update the 

domain name with another port’s IP address.

Note: If you enable high availability, DDNS can also function 

when the ZyWALL uses the dial backup port. DDNS does 
not function when the ZyWALL uses traffic redirect.

Apply

Click Apply to save your changes back to the ZyWALL.

Reset

Click Reset to begin configuring this screen afresh.

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