FRITZ!Box 3390 – Service - Knowledge Base

FRITZ!Box 3390 – Service

FRITZ!Box user interface cannot be opened

The FRITZ!Box user interface does not open after you enter fritz.box in your web browser (for example Chrome, Firefox) although the computer is connected to the FRITZ!Box by means of a network cable or wireless LAN (WiFi).

Important:As a rule, you cannot open the user interface with network devices connected to the FRITZ!Box via guest access.
If the FRITZ!Box uses an existing Internet connection in the network (operating mode "IP client" or "wireless repeater"), you can only open the user interface by entering the IP address manually assigned to the FRITZ!Box instead of fritz.box. If you have forgotten the IP address, you can open the user interface by entering the FRITZ!Box's "emergency IP address".

Important:Some of the settings described here are only displayed if the advanced view is enabled in the user interface. The configuration procedure and notes on functions given in this guide refer to the latest FRITZ!OS

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

1 Using the complete address to open the user interface

Some web browsers start an Internet search (for example Google Chrome using Google) if an unknown or incomplete address is entered. To avoid this, you must enter the complete address:

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 will not be deleted when it restarts. The restart will take about 2 minutes. During this time, you cannot access the FRITZ!Box user interface.

3 Clearing the cache of your web browser

The following step is only necessary if you see a blank, white or an incomplete page instead of the FRITZ!Box user interface:

4 Adjusting the web browser settings

Google Chrome

  1. Click the button (Customize and control Google Chrome) on the top right of Chrome.
  2. Click on "Settings" and then "Show advanced settings".
  3. Click "Change proxy settings" under "Network".
  4. Disable the proxy server or enter fritz.box as an exception in the corresponding field.
  5. Click "OK".

Mozilla Firefox

  1. Click the (open menu) button on the top right of Firefox.
  2. Click "Options" and then "Advanced".
  3. Click "Network" and then "Settings".
  4. Enable the option "No proxy" or enter fritz.box in the "No Proxy for" field.
  5. Click "OK".

Microsoft Edge

  1. Click the button (More actions) in the top right corner of Edge.
  2. Click on "Settings" and then "View advanced settings".
  3. Click "Open proxy settings".
  4. Disable the option "Use a proxy server" or enter fritz.box in the field for entering proxy server exceptions.
  5. Click "Save".

Microsoft Internet Explorer

  1. Click the "Tools" button on the top right of the Internet Explorer.
  2. If the menu "Work Offline" entry is displayed and there is a checkmark in front of it, click this entry to remove the checkmark.
  3. Click the "Internet Options" menu entry.
  4. Click "Connections" and then "LAN settings".
  5. Disable the option "Use a proxy server for your LAN" or enter fritz.box in the "Exceptions" field.
  6. Click "OK".

Other web browsers

  1. Disable "offline operation" in the web browser.

    Note:You can find detained information in the online help or you can consult the manufacturer of the web browser.

  2. If the web browser is configured so that it uses a proxy server:
    • Disable the option "Use a proxy server" in the web browser
      • or
    • Enter fritz.box as an "exception" in the proxy server settings.

5 Activating the "DHCP Client" service in Windows

Windows 10 / 8

  1. Press the keyboard shortcut "Windows key" + "X" and select "Control Panel" from the context menu.
  2. Select "Category" from the drop-down list "View by:" (top right) in the "Control Panel" menu.
  3. Click "System and Security" and then "Administrative Tools".
  4. Double-click on the entry "Services".
  5. Double-click on the entry "DHCP Client" displayed in the "Name" column.
  6. Select "Automatic" as the startup type.
  7. Click "Start" (if available) and then "OK".
  8. Restart your computer.

Windows 7

  1. In Windows, click "Start" and then "Control Panel".
  2. Select "Category" from the drop-down list "View by:" (top right) in the "Control Panel" menu.
  3. Click "System and Security", and then "Administrative Tools" and "Services".
  4. Double-click on the entry "DHCP Client" displayed in the "Name" column.
  5. Select "Automatic" as the startup type.
  6. Click "Start" and then "Apply".
  7. Restart your computer.

6 Configuring a network device as a DHCP client

Windows 10 / 8

  1. Press the keyboard shortcut "Windows key" + "X" and select "Control Panel" from the context menu.
  2. Select "Category" from the drop-down list "View by:" (top right) in the "Control Panel" menu.
  3. Click "Network and Internet" and then "Network and Sharing Center".
  4. Click "Change adapter settings".
  5. Click on the arrow next to the "More options" icon in the menu bar and select "Details".
  6. Right-click the connection that lists the (wireless or LAN) network adapter that connects the computer to the FRITZ!Box under "Device Name".
  7. Click "Properties".
  8. Select "Internet Protocol Version 4 (TCP/IPv4)".
  9. Click "Properties".
  10. Enable the options "Obtain an IP address automatically" and "Obtain DNS server address automatically".
  11. Click "OK" to save the settings.

Windows 7

  1. In Windows, click "Start" and then "Control Panel".
  2. Select "Category" from the drop-down list "View by:" (top right) in the "Control Panel" menu.
  3. Click "Network and Internet" and then "Network and Sharing Center".
  4. Click "Change adapter settings".
  5. Click on the arrow next to the "Change view" icon in the menu bar and select "Details".
  6. Right-click the connection that lists the (wireless or LAN) network adapter that connects the computer to the FRITZ!Box under "Device Name".
  7. Click "Properties".
  8. Select "Internet Protocol Version 4 (TCP/IPv4)".
  9. Click "Properties".
  10. Enable the options "Obtain an IP address automatically" and "Obtain DNS server address automatically".
  11. Click "OK" to save the settings.

macOS

  1. Open the Finder and click "Applications".
  2. Click "System Preferences" and then "Network".
  3. Select the following in the left-hand window:
    • If you would like to connect the FRITZ!Box to the computer over wireless LAN:
      • Select the option "Wi-Fi" or "AirPort".
    • If the FRITZ!Box is connected to your computer via LAN (network adapter):
      • Select the option "Built-in Ethernet".
  4. Click "Advanced".
  5. Switch to the TCP/IP settings page and select the option "Using DHCP:" from the drop-down list "Configure IPv4".
  6. Click "OK" to save the settings.

Other operating systems or network devices (such as smartphones, game consoles)

  • Configure the network device to automatically obtain an IP address (DHCP).

    Note:You can find information on configuring this in the corresponding manual, or consult the manufacturer of the operating system or network device.

7 Enabling the DHCP server

Preparations

  • Use a network cable to connect the computer to the "LAN 2" port on the FRITZ!Box.
    • Only if the FRITZ!Box is connected to the computer via wireless LAN:
      • Clear the wireless connection between the computer and the FRITZ!Box.

Configuring the FRITZ!Box

  1. Call up the address http://169.254.1.1 in a web browser.
  2. Click "Home Network" and then "Home Network Overview".
  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 uses 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.

8 Correcting the wireless settings

If you are using WEP encryption, you can establish a wireless connection to the FRITZ!Box even if you enter an invalid network key. However, no communication can occur with the FRITZ!Box.

The following step is only necessary if the computer and the FRITZ!Box are connected by means of a WEP-encrypted wireless connection:

ATTENTION!WEP encryption is not secure! Therefore you should use the secure WPA encryption if your wireless devices support it.