Using the Dynamic DNS (DDNS)

- What is DDNS?

The DDNS service, an IP Registry provides a public central database where information such as email addresses, hostnames, IPs etc. can be stored and retrieved. This solves the problems if your DNS server uses an IP associated with dynamic IPs.

Without DDNS, we always tell the users to use the WAN IP of the Prestige to access the internal server. It is inconvenient for the users if this IP is dynamic. With DDNS supported by the Prestige, you apply a DNS name (e.g., www.zyxel.com.tw) for your server (e.g., Web server) from a DDNS server. The outside users can always access the web server using the www.zyxel.com.tw regardless of the WAN IP of the Prestige.

When the ISP assigns the Prestige a new IP, the Prestige must inform the DDNS server the change of this IP so that the server can update its IP-to-DNS entry. Once the IP-to-DNS table in the DDNS server is updated, the DNS name for your web server (i.e., www.zyxel.com.tw) is still usable.

The DDNS server stores password-protected email addresses with IPs and hostnames and accepts queries based on email addresses. So, there must be an email entry in the Prestige menu 1.

The DDNS servers the Prestige supports currently is WWW.DYNDNS.ORG where you apply the DNS from and update the WAN IP to.

- Setup the DDNS

1. Before configuring the DDNS settings in the Prestige, you must register an account from the DDNS server such as WWW.DYNDNS.ORG first. After the registration, you have a hostname for your internal server and a password using to update the IP to the DDNS server.
2. Toggle 'Configure Dynamic DNS' option to 'Yes' and press ENTER for configuring the settings of the DDNS in menu 1.1.

`Menu 1 - General Setup System Name= P650 Location= Contact Person's Name= Domain Name= Edit Dynamic DNS= Yes Route IP= Yes Bridge= No`

`Menu 1.1 - Configure Dynamic DNS` `Service Provider= WWW.DynDNS.ORG` `Active= Yes` `Host= [the local server's host name]` `EMAIL= [your email address]` `User=` `Password= ******** Enable Wildcard= No`

Key Settings for using DDNS function:

Option | Description
Service Provider | Enter the DDNS server in this field. Currently, we support WWW.DYNDNS.ORG.
Active | Toggle to 'Yes'.
Host | Enter the hostname you subscribe from the above DDNS server. For example, zyxel.com.tw.
EMAIL | Enter the email address you give to the DDNS server.
User | Enter the user name that
Password | Enter the password that the DDNS server gives to you.
Enable Wildcard | Enter the hostname for the wildcard function that the WWW.DYNDNS.ORG supports. Note that Wildcard option is available only when the provider is WWW.DYNDNS.ORG.

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