ZyXEL Communications P-660RU-Tx Series Support Notes page 47

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 P-660RU-Tx
to access the internal server. It is inconvenient for the users if this IP is dynamic.
With DDNS supported by the P-660RU-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-660RU-Tx. When the ISP assigns the
P-660RU-Tx a new IP, the P-660RU-Tx 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 the P-660RU-Tx 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 P-660RU-Tx, 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. Login Web Configurator, Advanced Setup, Access Management ->
Dynamic DNS Select 'Actived' option:
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P-660RU-Tx Series Support Note s
47