Dynamic DNS in cPanel: update a subdomain's IP

Reviewed on September 8, 2026 4 min read dns dinamico subdominios

Domain without hosting: if your domain has no associated hosting, you can now manage dynamic DNS directly from the client area with a dedicated interface. See the guide to dynamic DNS from the client area.

Dynamic DNS lets you create a subdomain pointing to a dynamic IP and keep it up to date when the IP changes. cPanel can issue a certificate for the hostname if one is available, but you have to install or configure it on the destination device: DDNS doesn't enable HTTPS on its own.

This guide is specifically for domains with associated hosting that need to manage dynamic DNS from cPanel.

This can be useful for making a web server, a NAS storage device or a personal computer on a network with a dynamic IP, at your office, business or home, publicly reachable with a friendly name.

To begin, create the subdomain you want, in our example nas.tudominio.com. The subdomain will appear in the list and, next to its name and description, you'll see a URL.

The URL contains a secret credential and is used to update the dynamic IP, so it must be called from the network that IP belongs to. Don't publish it or include it in screenshots; if it is exposed, delete it and create a new one.

How you keep the IP up to date depends on your setup. For example, if you have administrator access to your router, it probably has an option where you can add this URL, so the router calls it every time the dynamic IP changes.

The same applies to NAS storage devices: their settings panel usually has features to hand this task over to the device.

Another option is to set up a cron job on the computer the subdomain points to, so that every few minutes it calls the address (for example with curl or wget), and cPanel updates the IP if it detects a change.

Differences between dynamic DNS methods

Feature	Dynamic DNS in cPanel	Dynamic DNS in the client area
Requirement	Domain with hosting	Domain without hosting
Where it's managed	cPanel	Client area
Setup	Manual, per subdomain	Dedicated interface
Multiple entries	One at a time	Up to 10 per domain
Token management	Regenerable URL; when you recreate it, the old one stops working	Regenerable tokens
IPv6	Supported	Supported
Enable/disable	Manual	Per entry

Which one to use?

Domains with hosting: use this feature from cPanel
Domains without hosting: use the new client area feature, which offers easier management and extra features

If the name resolves but doesn't connect

The update call must come from the network whose IP you want to publish. If you make it from the hosting, a VPN or a proxy, you may record the IP of that other exit point instead. Check the A and AAAA records separately, and the connectivity of each address family.

DDNS doesn't open ports or get around CGNAT. If your provider shares your public IPv4 address, check the remote access options for your connection; changing the record doesn't by itself let you receive incoming connections. Set up only the access you need and use authentication and encryption on the destination service.

After an IP change, confirm the public record and test from another connection. A valid certificate must be installed on the device that answers for the name, not just exist in cPanel.