If you are using the Windows or Mac version of our Dynamic Update Client, be sure you use the DDNS key username and password you generated for your hostname or domain to log in. You should then be able to select the alias all.ddnskey.com in the Hostname/Group list. That should connect to your hostname or domain and keep it updated to the latest IP address provided by your network.
If you are using our Linux client you can use the following command to run it:
noip-duc -g myhostname.ddns.net -u ddnskeyusername -p ddnskeypassword
There are a number of different features, please run noip-duc –help and be sure to check out the INSTALL.MD and README.MD files within the directory to see our full documentation and help guide.
The Windows/ MAC DUC will check for IP address change every 5 minutes. It cannot check faster than that but you can certainly set it to check at a slower interval in the Preferences Menu. The IP address will only change if a new IP address provided by your internet service provider is recognized. Your IP address must change for an update to be logged in the update server.
Please note that updates on your hostname do not confirm them. In order to keep your No-IP Free account active (even if your IP address has NOT changed), you must confirm your hostname every 30 days. You can manually update your hostname by logging into your account and navigating to DDNS & Remote Access. A banner with a warning to confirm your hostname should be listed at the top and a confirm button to the right that you can press should keep your hostname active. Two notification emails will also be sent before your hostname enters redemption. Please review this knowledge base article for further information on how to confirm your hostname.