ZyXEL Communications 5 Series - Manual (Page 450)

ZyWALL 5/35/70 Series User’s Guide
450 Chapter 25 DNS
IP Address Update
Policy Select Use WAN IP Address to have the ZyWALL update the domain name
with the WAN port'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 port’s IP
address when the normal WAN port does not have a connection.
If the WAN port specified in the WAN Interface field does not have a
connection, the ZyWALL will attempt to use the IP address of another WAN port
to update the domain name.
When the WAN ports are in the active/passive operating mode, the ZyWALL will
update the domain name with the IP address of whichever WAN port 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 port specified in the WAN Interface field. If that WAN
port 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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