Dyndns Wildcard; High Availability; Configuring Dynamic Dns - ZyXEL Communications Internet Security Appliance ZyWALL5UTM 4.0 User Manual

Internet security appliance

Table of Contents

26.10 Dynamic DNS

Dynamic DNS allows you to update your current dynamic IP address with one or many

dynamic DNS services so that anyone can contact you (in NetMeeting, CU-SeeMe, etc.). You

can also access your FTP server or Web site on your own computer using a domain name (for

instance myhost.dhs.org, where myhost is a name of your choice) that will never change

instead of using an IP address that changes each time you reconnect. Your friends or relatives

will always be able to call you even if they don't know your IP address.

First of all, you need to have registered a dynamic DNS account with www.dyndns.org. This is

for people with a dynamic IP from their ISP or DHCP server that would still like to have a

domain name. The Dynamic DNS service provider will give you a password or key.

Note: You must go to the Dynamic DNS service provider's website and register a

user account and a domain name before you can use the Dynamic DNS

service with your ZyWALL.

26.10.1 DYNDNS Wildcard

Enabling the wildcard feature for your host causes *.yourhost.dyndns.org to be aliased to the

same IP address as yourhost.dyndns.org. This feature is useful if you want to be able to use,

for example, www.yourhost.dyndns.org and still reach your hostname.

Note: If you have a private WAN IP address, then you cannot use Dynamic DNS.

A DNS server maps a domain name to a port's IP address. If that WAN port loses its

connection, high availability allows the router to substitute another port's IP address for the

domain name mapping.

To change your ZyWALL's DDNS, click ADVANCED, DNS, then the DDNS tab. The

screen appears as shown. Not all fields are available on all models.

Chapter 26 DNS

ZyWALL 5/35/70 Series User's Guide