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P-660R-Tx Series Support Note s
12. What is DDNS?
The Dynamic DNS service allows you to alias a dynamic IP address to a static
hostname, allowing your computer to be more easily accessed from various
locations on the Internet. To use the service, you must first apply an account from
several free Web servers such as http://www.dyndns.org/.
Without DDNS, we always tell the users to use the WAN IP of the P-660R-Tx to
reach our internal server. It is inconvenient for the users if this IP is dynamic.
With DDNS supported by the P-660R-Tx, 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 P-660R-Tx.
When the ISP assigns the P-660R-Tx a new IP, the P-660R-Tx updates this IP
to DDNS server 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.
13. When do I need DDNS service?
When you want your internal server to be accessed by using DNS name rather
than using the dynamic IP address we can use the DDNS service. The DDNS
server allows to alias a dynamic IP address to a static hostname. Whenever the
ISP assigns you a new IP, the P-660R-Tx sends this IP to the DDNS server for
its updates.
14. What is DDNS wildcard? Does the P-660R-Tx support DDNS wildcard?
Some DDNS servers support the wildcard feature which allows the hostname,
*.yourhost.dyndns.org, to be aliased to the same IP address as
yourhost.dyndns.org. This feature is useful when there are multiple servers inside
and you want users to be able to use things such as www.yourhost.dyndns.org
and still reach your hostname.
Yes, the P-660R-Tx supports DDNS wildcard that http://www.dyndns.org/
supports. And you can choose to active or inactive this feature on the web
configuration page. When using wildcard, you simply enter
yourhost.dyndns.org on the web configuration page.
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