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Dokument informacyjny #106

Setting up the FRITZ!Box for use with another router

You want to use the FRITZ!Box with another router and use the existing internet connection? ✓ Here's how to set up the FRITZ!Box for this.

The FRITZ!Box can use the existing internet connection of another router. In this case, the FRITZ!Box provides its own network that is separate from the router. As a result, devices connected to the FRITZ!Box no longer obtain their IP settings from the other router. Instead, they obtain them from FRITZ!Box. The firewall of the FRITZ!Box remains enabled.

Requirements / Restrictions

  • It is not possible to access devices connected to the FRITZ!Box from the other router's network.
  • Depending on the other router, functions that require a public IP address (for example port sharing and receiving incoming VPN connections) can either not be used, or can only be used to a limited extent.
  • The FRITZ!Box and the other router must use different IP networks.

    Note:In the factory settings, the FRITZ!Box uses the IP network 192.168.178.0 (subnet mask 255.255.255.0). The IP network can be adjusted as described in the guide Changing the FRITZ!Box's IP address.

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 "Other internet service provider" from the drop-down list "Internet service provider".
  4. Enable the option "Internet connection via 'LAN 1'".
  5. Enable the option "No" in the section "Account Information".
  6. Click "Change connection settings".
  7. If the other router provides a DHCP server, enable the option "Obtain the IP address automatically (DHCP)".
    • If the other router does not provide a DHCP server, enable the option "Configure the IP address manually" and enter IP settings that fit with the IP network of the router:
      • "IP address": IP address from the router's network.

        Example:
        The router has the IP address 192.168.10.1 (subnet mask 255.255.255.0) and is therefore in the network 192.168.10.0. In this case you can enter 192.168.10.2 as the IP address.

        Important:The IP address you select may not already be used by any other device in the router's network.

      • "Subnet mask": Subnet mask of the router
      • "Default gateway": IP address of the router
      • "Primary DNS server": IP address of the router
  8. Click "Apply" to save the settings.

2 Connecting the FRITZ!Box with the network

  1. Use a network cable to connect the "LAN 1" port on the FRITZ!Box either directly to a LAN port on the router, or by means of a hub or switch.

3 Opening the user interface

You can enter http://fritz.box to open the user interface with devices connected to the ports "LAN 2" through "LAN 4" or to the FRITZ!Box's Wi-Fi network.

If you also want to open the FRITZ!Box user interface with devices that are connected to the other router, you must enable internet access via HTTPS in the FRITZ!Box and set up a FRITZ!Box user who is allowed to access the FRITZ!Box from the internet:

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "FRITZ!Box Users" in the "System" menu.
  3. Click the "Add User" button.
  4. Enter a username and a password for the user.
  5. Enable the option "Access from the internet allowed".
  6. Enable the option "FRITZ!Box settings" under "Rights".
  7. Click "Apply" to save the settings.
  8. Click "Permit Access" in the "Internet" menu.
  9. Click on the "FRITZ!Box Services" tab.
  10. Enable the option "Internet access to the FRITZ!Box via HTTPS enabled".
  11. Click "Apply" to save the settings.

You can now also open the FRITZ!Box user interface with devices connected to the other router using the address in the field "Web address of your FRITZ!Box" (for example https://192.168.10.20:8596).

4 Setting up telephony

If you want to connect telephones to the FRITZ!Box and then use them to make telephone calls over the other router's internet connection:

  1. Set up the FRITZ!Box to make telephone calls over the other router.
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