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Troubleshooting
101
10
Troubleshooting
Help for Errors
This chapter provides assistance if you are not able to open the user in-
terface of your FRITZ!Box, if you are having problems with the WLAN
connection, or if you want to change the IP settings on your computer.
10.1
Errors Opening the User Interface
If an error message is returned when you open the user in-
terface, this can have various causes. Check the possible
causes and attempt to resolve the error.
Restarting the FRITZ!Box
The user interface cannot be opened or does not react.
Inconsistencies within the FRITZ!Box.
1.
Restart the FRITZ!Box.
Remove the power cable from the socket.
2.
Wait about five seconds before reconnecting to the
power supply.
3.
To make sure that the FRITZ!Box has finished restart-
ing, wait until the “Power / DSL” LED lights up and
stops flashing and, if you have switched on WLAN,
the “WLAN” LED stays lit as well. This ensures that
the FRITZ!Box restart has been completed.
4.
Try again to open the FRITZ!Box user interface by en-
tering
fritz.box
in the address field.
Possible Cause
Remedy
Page 102 / 197
102
Checking the Cable Connections
Checking the Cable Connections
The user interface of the FRITZ!Box does not appear in the
window of your web browser.
The cable connections are not secure.
Make sure that all cable connections are plugged in se-
curely.
Checking the Name Resolution
The user interface of the FRITZ!Box cannot be opened by
entering
fritz.box
.
The name resolution of the FRITZ!Box does not work.
1.
In the web browser, enter the following IP address in
place of
fritz.box
:
192.168.178.1
2.
If the user interface cannot be reached via this ad-
dress, check the settings configured for your network
adapter as described in the section “Obtaining an IP
Address Automatically” from page 115.
Possible Cause
Remedy
Possible Cause
Remedy
Page 103 / 197
Checking the IP Address
103
Checking the IP Address
The user interface of the FRITZ!Box can be reached
neither at the address
fritz.box
nor at
192.168.178.1
.
The IP address set on the connected computer is inappli-
cable.
Set the network adapter to DHCP so that the IP address
can be obtained via the DHCP server of the FRITZ!Box. Ad-
just the settings to those described in the section “Ob-
taining an IP Address Automatically” from page 115.
If it is still not possible to open the FRITZ!Box user inter-
face by entering
fritz.box
or
192.168.178.1
, use the fixed
IP address of the FRITZ!Box as described on page 106.
Disabling Dial-Up Connections
The user interface is not opened; a window for a dial-up
connection appears instead.
The browser must use the network connection between
the computer and FRITZ!Box when the user interface is
opened. For this the automatic establishment of a Dial-Up
Networking connection must be disabled.
You can disable the automatic attempt to establish a Dial-
Up Networking connection. The following example ex-
plains how to check the settings of Internet Explorer 8:
1.
Select the “Connections” settings page under
“Tools/ Internet Options...”.
2.
In the “Dial-up and Virtual Private Network settings”
section, enable the option “Never dial a connection”.
3.
As a final step, click “OK”.
Possible Cause
Remedy
Possible Cause
Remedy
Page 104 / 197
104
Disabling Online Operation
Disabling Online Operation
The user interface does not appear in the window of your
web browser.
The web browser is set for offline operation.
Configure the web browser for online operation. Using the
example of Internet Explorer 8:
1.
Open the “Tools” menu.
2.
If a checkmark is displayed in front of “Work Offline”,
click this line.
The checkmark will be removed and Internet Explorer will
switch to online operation.
Checking the Proxy Settings
The user interface does not appear in the window of your
web browser.
The proxy settings of the web browser prevent the user in-
terface from being opened.
Enter the DNS name and the IP address of the FRITZ!Box as
an exception in the proxy settings of the web browser, as
described here for the example of the Internet Explorer 8.
1.
Select the “Connections” settings page under
“Tools / Internet Options...”.
2.
Click the “LAN Settings...” button in the “Local Area
Network (LAN)” settings area.
3.
In the “Proxy server” area of the next window, check
the “Use proxy Server for LAN” option and then click
“Advanced”.
Possible Cause
Remedy
Possible Cause
Remedy
Page 105 / 197
Checking the CGI Settings
105
4.
Enter as “Exceptions”:
fritz.box; 192.168.178.1; 169.254.1.1
and click “OK”.
Checking the CGI Settings
The user interface does not appear in the window of your
web browser.
The execution of CGI scripts is disabled in the web brows-
er.
Configure the web browser so that the execution of scripts
is allowed in the user interface. Using the example of the
Internet Explorer 8:
1.
Select the “Security” settings page under “Tools / In-
ternet Options...”.
2.
If the “Default Level” button is not available for selec-
tion, the “Medium” security level is already config-
ured, which means that CGI scripts can be executed
in the Internet browser.
3.
Proceed as follows if the “Default Level” button is
available for selection:
4.
Select the “Local Intranet” icon and click the
“Sites...” button.
5.
In the next window, click the “Advanced...” button
and enter in the “Add this Web site to the zone:”
field:
fritz.box
Click “Add”.
6.
Disable the “Require server verification (https:) for all
sites in this zone” option and click “Close”.
Possible Cause
Remedy

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