When Dynamic DNS is enabled:
- Open cPanel → Domains → Dynamic DNS.
- Click Create.
- Enter a unique subdomain and select the parent domain.
- Optionally enter an initial IPv4 or IPv6 address and a description.
- Click Create.
- Copy the generated webcall URL into the DDNS/custom update configuration on the router or device.
The device calls the webcall URL to tell cPanel when the public address changes.
Treat the webcall URL as a secret capability URL. Anyone who possesses it can trigger the protected DDNS update endpoint. Use encrypted HTTPS connections and do not publish the URL.
