FRITZ!Box 4020 Serwis - Baza wiedzy

FRITZ!Box 4020 Serwis
Not your product?
This document is also available for the following products:

Cannot access the Internet via a modem (for example a cable modem)

Computers, smartphones, and other devices connected to the FRITZ!Box cannot access the Internet when the FRITZ!Box establishes the Internet connection using a DSL, fiber optic, or cable modem.

One of the following error messages may be displayed in the "Network and Sharing Center" of the respective computer:

  • "Access: Local only"
  • "Access type: No Internet access"

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

1 Restarting the modem

  • Restart the modem by unplugging it briefly.

    Note:It may take several minutes for the modem to restart. While it is restarting you will not be able to access the Internet.

2 Restarting the FRITZ!Box

  1. Unplug your FRITZ!Box by removing the power cable from the electrical outlet.
  2. Plug it in again after 5 seconds.

    Note:The FRITZ!Box settings remain intact. The restart will take about 2 minutes. During this time, you cannot access the FRITZ!Box.

3 Checking the event log of the FRITZ!Box

  1. Click "System" in the FRITZ!Box user interface.
  2. Click "Event Log" in the "System" menu.
  3. Select "Internet connection" from the drop-down list.
  4. Check whether error messages are displayed.
    • If the message "Internet connection failed: Reason for error: 2 (DHCPv4 no answer on DISCOVER)" is displayed and you are using the FRITZ!Box with a cable modem:
      • Contact your cable provider for a solution.
    • If the message "PPPoE error: Timeout [...]" is displayed:

4 Enabling the FRITZ!Box's DHCP server

The FRITZ!Box is configured as a DHCP server in the factory settings. If you disabled the FRITZ!Box's DHCP server, configure the following settings:

Important:If the FRITZ!Box uses the Internet connection of another router, then the FRITZ!Box's DHCP server is disabled. In this case, the upstream router must assign the necessary IP settings to the network devices.

  1. Click "Home Network" in the FRITZ!Box user interface.
  2. Click "Home Network Overview" in the "Home Network" menu.
  3. Click on the "Network Settings" tab.
  4. Click the "IPv4 Addresses" button.
  5. Enable the DHCP server and define the range from which the FRITZ!Box assigns IP addresses.

    Note:The FRITZ!Box has the IP address 192.168.178.1 (subnet mask 255.255.255.0) and assigns IP addresses from xxx.20 to xxx.200 in the factory settings.

  6. Click "OK" to save the settings.

5 Configuring a network device as a DHCP client

To ensure that the network device always uses the correct IP settings, make sure that it is configured as a DHCP client (this is the standard setting for most devices and operating systems):

6 Configuring the Internet Explorer

Perform the following step only if you are using Microsoft Internet Explorer and it displays the message "Web page unavailable while offline":

  1. Start the Internet Explorer.
  2. Open the "Tools" menu.
  3. If the menu "Work Offline" entry is displayed and there is a checkmark in front of it, click this entry to remove the checkmark.
  4. Click the "Internet Options" menu entry and then "Connections".
  5. Enable the option "Never dial a connection".
  6. Click "OK" to save the settings.

7 Configuring the computer's firewall

A firewall can interfere with the communication between the computer and the FRITZ!Box:

  • Configure the firewall on the computer so that it allows connections from the computer to the FRITZ!Box. Refer to the manufacturer of the firewall for information on how to set it up, for example consult the manual.

8 Checking the modem

The modem may be defective or malfunctioning. Therefore, check whether you can establish an Internet connection if you connect the modem directly to a computer:

  1. Use a network cable to connect the modem to a computer.
  2. On the computer, configure an Internet connection that uses the modem. Refer to the manufacturer of the operating system for information on the procedure.
  3. Check whether the computer can connect to the Internet.
    • If you cannot successfully connect to the Internet:
      • Contact the modem's manufacturer or the retailer you bought it from.
    • If you were able to successfully connect the Internet:
      • Proceed with the following section.

9 Reconfiguring the Internet connection in the FRITZ!Box

In order to rule out incorrect configuration of the FRITZ!Box as a cause, reconfigure Internet access: