Synology DiskStation DS111 User Manual page 62

Service Requirement
 The DDNS server of the service provider is working normally.
 The gateway connection is normal.
 Synology DiskStation is able to connect to the DNS server.
 The following addresses are unblocked in the Firewall:
 http://members.dyndns.org:80
 http://checkip.dyndns.org:80
 DDNS will only run in a network environment where there is no proxy server required.
Register a DDNS hostname for Synology DiskStation
Go to Main Menu > Control Panel
information.
Method 1: Visit any DDNS service provider's website to register a DDNS account
1 Visit any of the following DDNS service providers to register a DDNS account:

http://freedns.afraid.org

http://zoneedit.com

http://dnspod.com

http://changeIP.com

http://ddo.jp

http://www.selfhost.de/

http://www.dyndns.com/

http://www.no-ip.com/

http://www.3322.org/

http://www.twodns.de/
2 Tick Enable DDNS support
3 Click OK.
Note: Remember to enter the full domain name in the
62 Chapter 5: Access your DiskStation from the Internet
> DDNS and use one of the following methods to enter your DDNS
and enter the hostname, username, and password for your Synology DiskStation.
Hostname
Synology DiskStation User's Guide
field. (e.g. philip1234.dyndns.org)
Based on DSM 3.1