Ddclient

ddclient is a tool to update dynamic DNS services like DynDNS or no-ip. It runs as daemon and supports many services.

Fix permissions
Use these commands to fix permissions:

Configuration
The configuration is done in the file. It must not be world or group readable.

no-ip.com
Take a look an example configuration for no-ip.com:

Automatic start
To start the ddclient daemon:

To have the client start at boot: