DDNS Updater checks for changes to the external IP address of a Microsoft Windows computer, and updates a dynamic DNS (DDNS) service whenever a change is detected.

DDNS Updater has the following features:

• Compatible with a large number of DDNS services, thanks to a configurable HTTP API
• Minimizes API calls, e.g. by persistent caching of the IP address and local IP matching
• Configurable check and update intervals
• Works with IPv4 and IPv6 (including dual-stack)
• Sends email when the detected IP address changes
• Runs as a Windows service, so that updating occurs even when no-one is logged in
• Completely free of charge with no adware or spyware
• No transmission/collection of data