FRITZ!Box 6820 LTE Service - Knowledge Base

FRITZ!Box 6820 LTE Service

FRITZ!Box reports "Dynamic DNS: Account temporarily disabled"

The dynamic DNS account you configured in the FRITZ!Box cannot be successfully registered with your dynamic DNS provider. The message "Dynamic DNS [...] Status: account temporarily disabled" is displayed on the overview page of the FRITZ!Box user interface. One of the following error messages may be displayed in the event log of the FRITZ!Box:

  • "Dynamic DNS error: Dynamic DNS update is disabled until the dynamic DNS account information is changed."
  • "Dynamic DNS error: The DynDNS provider reports error 401 - bad authorization."


  • When errors indicating a permanent error with a dynamic DNS account occur, the FRITZ!Box disables the account according to the specifications of the dynamic DNS provider. Such errors include a missing public IP address, incorrect account information, or numerous registration attempts from different dynamic DNS clients. The account remains disabled until you re-enter the registration data in the FRITZ!Box.

Note:All instructions on configuration and settings given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

1 Checking whether a public IP address was obtained

You can only use a dynamic DNS service and access the FRITZ!Box from the internet if the FRITZ!Box obtains a public IP address when it connects to the internet:

  1. Check the address range of the IP address that the internet service provider assigned to the FRITZ!Box.
  2. If the FRITZ!Box obtained a public IP address, proceed with the following section.
    • If the FRITZ!Box obtained a private IP address, you cannot use a dynamic DNS service and access the FRITZ!Box from the internet.

2 Disabling other dynamic DNS clients

Errors occur if several devices transmit their IP address to the same dynamic DNS account. Therefore, make sure that the dynamic DNS account is only configured in the FRITZ!Box:

  1. Disable or delete the dynamic DNS account configured in the FRITZ!Box in all devices except for the FRITZ!Box, for example other routers, computers with DynDNS software, or NAS systems.

3 Re-entering the dynamic DNS account information

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "Permit Access" in the "Internet" menu.
  3. Click on the "DynDNS" tab.
  4. In the "Domain name" field, enter the complete domain name, for example Refer to the dynamic DNS provider for information on the format.
  5. Click "Apply" to save the settings.

Now the FRITZ!Box transmits its current IP address to the dynamic DNS provider each time it connects to the internet.

4 Contacting your provider

If the dynamic DNS account configured in the FRITZ!Box is still disabled, then the account information is incorrect or the dynamic DNS provider may be experiencing technical difficulties:

  1. Contact your dynamic DNS provider for a solution.