FRITZ!Box 4020 Service - Knowledge Base

FRITZ!Box 4020 Service

Cannot access the FRITZ!Box with MyFRITZ!

The MyFRITZ! home page of your FRITZ!Box cannot be opened:

  • After logging into, you are not automatically redirected to the FRITZ!Box.
  • After selecting a FRITZ!Box in the overview of devices on, the selected FRITZ!Box is not displayed.
  • You cannot call up the FRITZ!Box with its unique MyFRITZ! domain name (for example

One of the following error messages is displayed by your web browser:

  • "The page cannot be displayed"
  • "This webpage is not available"
  • "Error: Network Timeout"
  • "Site cannot be reached"
  • "Session Timeout"
  • "Data Transfer Interrupted"
  • "The server [...] took too long to respond"
  • "404 not found"
  • "requested resource was not found"

Note:The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS for the FRITZ!Box.

Simply proceed as described below. After each measure, check whether the problem persists.

1 Checking whether a public IP address was obtained

You can only access the FRITZ!Box over the internet if the FRITZ!Box establishes its own connection to the internet using a modem (for example a DSL or cable modem) and it obtains a public IP address from the internet service provider:

Important:The FRITZ!Box can only be accessed over IPv6 when used on an internet connection with DS-Lite tunnel. If a DS-Lite tunnel is enabled, this is displayed under "Connections" on the "Overview" page of the FRITZ!Box user interface.

  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.
    • You cannot access the FRITZ!Box over the internet if the FRITZ!Box obtained a private IP address.

2 Enabling internet access to the FRITZ!Box via HTTPS

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "MyFRITZ! Account" in the "Internet" menu.
  3. Enable the option "Internet access to the FRITZ!Box via HTTPS enabled".
  4. Click "Apply" to save the settings.

3 Maintaining a permanent internet connection

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "Account Information" in the "Internet" menu.
  3. Click "Change connection settings".
  4. Enable the option "Maintain permanently (recommended for flat rates)". If the option is not shown, then the FRITZ!Box is already permanently connected to the internet.
  5. Click "Apply" to save the settings.