DynDNS is a network protocol that solves addressing for dynamic or frequently changing IP addresses.
The history of DynDNS begins in 1998, when Jeremy Hitchcock and Thomas Kuehnel founded Dynamic DNS Network Services. The company's initial goal was to build the DynDNS service for home users on providers that hand out dynamic IP addresses.
At first DynDNS was free, but a paid subscription was later introduced, which made the company profitable. DynDNS then started offering services for business customers too, for whom more advanced, higher-performance services were developed.
In 2012 DynDNS acquired the company DYN, and they have worked together ever since, developing and improving services for customers. Today DynDNS/DYN is one of the most popular and significant DNS services in the world.
The DynDNS service has a wide range of applications and solves a variety of tasks.
Dynamic IP addresses: if your Internet provider assigns a dynamic IP address, DynDNS lets you connect to your equipment (a server or a camera, say) by a fixed domain name that is updated automatically whenever the IP address changes.
Remote access: DynDNS is often used for remote access to home or office networks. This is handy for administering servers, accessing files or managing devices.
IP cameras and monitoring: used to reach IP cameras or surveillance systems, letting owners watch their property from anywhere in the world.
Cloud services and IoT: Internet of Things (IoT) devices and cloud services can also use DynDNS to simplify access to and management of devices.
Gaming and server hosting: many gamers and hosting providers use DynDNS to run game servers, so that other players can connect by domain name instead of hunting for the current IP each time.
The service needs a client — the DUC (Dynamic Update Client), which sends the server commands to update the domain's address.
