Dyn Managed DNS provides Dynamic DNS or DDNS to allow customers to update a DNS hostname (such as myhost.mydomain.tld) with a dynamic IP address so that when end users type in myhost.mydomain.tld, it will always resolve to the current IP address regardless of whether it has changed.

There are three steps to setting up Dynamic DNS service:

Create a Dynamic user

In order to use Dynamic DNS, you must first create a special dynamic user. For security purposes, dynamic users are used specifically to provide dynamic update credentials and are not permitted to log in to the web based Dyn Managed DNS interface. Dynamic users are the only users that are compatible with the Dynamic DNS service and certified update clients, allowing for compatibility with many generations of home gateway routers, update clients, and other IP devices.  The Quick Task:  Create Dynamic DNS Host creates a Dynamic UpdateUser while adding Dynamic DNS service to your account.

Add the Dynamic DNS service your account

The Dynamic DNS service must be activated on a host record before it will accept dynamic updates. The service can be added to an existing A record or it can be added when the A record is created. See Quick Task:  Create Dynamic DNS Host for instructions on setting up the Dynamic DNS Service.

Setup your update client

The update client is responsible for sending updates to Dyn Managed DNS whenever a host’s IP address changes.
See Working With Update Clients for more information on setting up your update client.

Working with Dynamic Users

Retrieving Dynamic UpdateUsers Passwords

Changing Dynamic UpdateUsers Passwords

Deleting Dynamic UpdateUsers is done the same way as deleting a regular user. When deleting a Dynamic UpdateUser currently used by an Update Client, make sure to replace the deleted user with a new Dynamic UpdateUser in the Update Client.  If you need assistance with this situation, please contact our helpful and knowledgeable Concierge team.

Working with Update Clients

In order to configure an update client you will need the following three items:

  • UpdateUser Username
  • UpdateUser Password
  • Host Label that has an activated Dynamic DNS service

The details of how and where to enter this information to correctly configure your update client are unique to the particular client you are using. The following information may be helpful in selecting and configuring an appropriate update client for you needs:

Hardware and Software Update Clients
A list of currently supported software update clients is available on the DynDNS site:


Update Client Specification
If you are interested in writing your own update client, the API specification is available on the DynDNS site:


Please note: Currently certified update clients only support dynamic updates to IPv4 host records. For details on dynamic updates to IPv6 host records, please contact your Dyn Concierge.

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