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Knowledge document #3757

Local DNSSEC cannot be used via the FRITZ!Box

Since updating FRITZ!OS, DNS requests are no longer resolved via the FRITZ!Box if the devices use a DNSSEC validation (i.e. an authenticity validation of DNS entries for a domain).

The problem affects both their own local DNS servers in the home network (for example Pi-hole, Bind9), which are announced via the FRITZ!Box DHCP server, and connector in doctors' offices and pharmacies (for example Gematik, secunet).

Installing a LabPlus version

In LabPlus, we make updates available that contain new functions and improvements before these become part of the regular FRITZ!OS. Install the LabPlus version of FRITZ!OS because the error has already been corrected in it:

Note:You can use the LabPlus version until a new FRITZ!OS update is available.

  1. Call up https://service.avm.de/downloads/LaborPlus/ in a web browser and switch to the folder for your FRITZ!Box model.
  2. Download the LabPlus version for your FRITZ!Box model to the computer.
  3. Unzip the ZIP file to your computer, for example to the Desktop.
  4. Perform a manual FRITZ!OS update to the LabPlus version (image file).

    Note: The button "Back to the Official FRITZ!OS" under "System > Update" allows you to reinstall the regular FRITZ!OS for the FRITZ!Box at any time.

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