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3.1.2.2 DDNS
To set up a server on the Internet and enable the users to access it easily, a fixed
and easy-to-remember host name is often required. However, if the ISP provides
only dynamic IP address, the IP address of the server will change from time to time
and is difficult to recall. You can enable the DDNS service to solve the problem.
After enabling the DDNS service of the NAS, whenever the NAS restarts or the IP
address is changed, the NAS will notify the DDNS provider immediately to record the
new IP address. When the user tries to connect the NAS via the host name, the
DDNS will transfer the recorded IP address to the user.
The NAS supports the DDNS providers: members.dyndns.org, update.ods.org,
members.dhs.org, www.dyns.cx, www.3322.org, www.no-ip.com.
Check the External IP Address Automatically: Enable this option if your NAS is
located behind a gateway. The NAS checks the external (WAN) IP automatically
and if the IP address is changed, the NAS will inform the DDNS provider
automatically to ensure it can be accessed via the host name.
For the information of setting up the DDNS and port forwarding on the NAS, please
refer to the online tutorial:
http://www.qnap.com/pro_features.asp .