FRITZ!Box 4020 Service - Knowledge Base

FRITZ!Box 4020 Service
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Configuring "Existing connection over wireless LAN" in the FRITZ!Box

You can connect the FRITZ!Box to a wireless router (for example belonging to a neighbor) over Wi-Fi so that all of the network devices in the FRITZ!Box home network can use the router's internet connection.

In this case, the FRITZ!Box functions as a router itself and and provides its own network with its own network address range. You can use the wireless router's Wi-Fi network, or you can also use the FRITZ!Box's Wi-Fi network with its separate security settings.

Requirements / Restrictions

  • The FRITZ!Box must use a different IP network than the wireless router.

    Note:If the FRITZ!Box's IP settings are the factory settings, they are automatically adjusted when you set up the connection via Wi-Fi (IP network:, subnet mask:

  • Devices connected to the wireless router cannot access devices connected to the FRITZ!Box.
  • You can no longer set up Wi-Fi connections to the FRITZ!Box with WPS (push button method).

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

1 Configuring the operating mode

  1. Click "Internet" in the FRITZ!Box user interface.
  2. Click "Account Information" in the "Internet" menu.
  3. Select "Existing connection over wireless LAN" from the drop-down list "Internet connection via".
  4. In the "Wireless LAN devices" section, use the name of the Wi-Fi network (SSID) to select the Wi-Fi network you want to connect the FRITZ!Box to. If the Wi-Fi network is not listed, click the "Refresh List" button first.
  5. If the wireless router's Wi-Fi network is protected with a password, enter it in the "Network key" field.
  6. Click "Apply" to save the settings.

Now the FRITZ!Box and the wireless router are connected via Wi-Fi. All network devices in the FRITZ!Box home network can use the router's internet connection.