DDNS.org Documentation

DDNS.org provides a convenient and fast way for reach your fixed line with dynamic IP using an Internet URL.

What is DDNS

Technically speaking:
The dynamic DNS protocol permits lightweight and immediate updates of a hostname from a client, often a modem. This provides a persistent addressing method for devices that change their IP address frequently.

In practice:
Using the hostname created on DDNS, and configured on the modem, you can reach your connection as if it had a Static IP.

This is possible because the hostname points at any time to the dynamic IP of the connection thanks to the updates it receives from the modem.


Using dynamic DNS, access occurs directly to your modem, unlike Cloud or P2P systems where the connection passes through external servers.

Therefore, using Dynamic DNS you have more security and less chance that your connection will be 'seen' by others.

Without any intermediate server, the speed of the connection is the best possible. DDNS is used only to find the IP and not during the connection.

... & Cons

The use of DDNS needs a Public IP without NAT, that often only fixed Internet connection have.

Another aspect to consider is that the use of DDNS requires that port forwarding is also configured on your modem in order to get the connection coming from the Internet directly to the device (PC, Camera, Domotica) that we want to reach remotely.

{warning} DDNS requires your connection to have a Public IP without NAT. Usually, fixed connections like ADSL or Fibre offer Public IPs unlike Mobile connections like 4G or LTE.

DDNS.ORG Use Cases

DDNS.ORG can be used for example for

  • Remote access to a home automation system to regulate the temperature;
  • Remotely view the cameras located in your home;
  • Access to documents and files stored in a NAS located in the office.

How to use

To use dynamic DNS it is necessary to configure the modem in order to allow the hostname to be updated and to open the ports to the connection coming from the outside.

{primary} Read more about setting up DDNS.org on the page Getting Started


Term Meaning
Hostname The Internet address that the user creates to point his connection
Device The device behind the modem that the user want to reach from remote. It can be a camera, a PC, an home automation system, a DVR,...
dynDNS The Dynamic DNS Service aka DDNS
modem the device that connects your LAN to the Internet. The term modem is used interchangeably with the term router
router the device that connects your LAN to the Internet. The term router is used interchangeably with the term modem

{primary} You can start today with a free trial and create your hostname that points to your Fiber or ADSL connection. Click Here for free trial , no credit card needed.

Now it's time to Get Started