Fritz! 4020 Box Quick guide

FRITZ!Box 4020
© AVM GmbH · Alt-Moabit 95 · 10559 Berlin · Telefon [phone] · [e-mail]
avm.de
Configuration
and Operation

FRITZ!Box 4020 2
Table of Contents
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Conventions in the Manual . . . . . . . . . . . . . . . . . . . . . . . 8
1 The FRITZ!Box 4020 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 Ports, Interfaces, Buttons and LEDs . . . . . . . . . . . . . . . 10
2.1 Ports and Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3 Before You Connect the FRITZ!Box . . . . . . . . . . . . . . . . . 13
3.1 Contents of the FRITZ!Box Package. . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 Requirements for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.3 Handling the FRITZ!Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.4 Tips for Passwords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4 Connecting the FRITZ!Box. . . . . . . . . . . . . . . . . . . . . . . . 16
4.1 Connecting to Electrical Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.2 Connecting to the Internet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5 Connecting a Computer with a Network Cable . . . . . . . 18
5.1 Connecting to the Computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.2 Connecting a Network Hub or Switch . . . . . . . . . . . . . . . . . . . . . . . . 19
6 Connecting Devices with the FRITZ!Box over
Wireless LAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
6.1 Establishing a Wireless LAN Connection Using WPS . . . . . . . . . . . . 20
6.2 Entering the Network Key on the Wireless Device . . . . . . . . . . . . . . 22
6.3 Connecting to Mobile Devices Wirelessly Using the QR Code. . . . . 23

FRITZ!Box 4020 3
7 The FRITZ!Box User Interface . . . . . . . . . . . . . . . . . . . . . 24
7.1 Opening the User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.2 Overview: FRITZ!Box at a Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7.3 Assigning FRITZ!Box a Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8 Password Protection: Using FRITZ!Box Safely . . . . . . . . 27
8.1 FRITZ!Box Password and FRITZ!Box Users . . . . . . . . . . . . . . . . . . . . 27
8.2 Using a FRITZ!Box Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
8.3 Using FRITZ!Box Users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.4 Forgot Password—What to Do . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
8.5 “No login” Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9 Configuring an Internet Connection on the WAN Port. . 37
9.1 Connecting to a Cable Modem or Internet Router . . . . . . . . . . . . . . 37
9.2 Connecting to a VDSL, DSL or Fiber Optic Modem . . . . . . . . . . . . . . 38
9.3 Connecting to the Internet Router as an IP Client . . . . . . . . . . . . . . 39
9.4 Wireless LAN Connection to the Internet Connection . . . . . . . . . . . 40
10 Connecting to the Internet via the Mobile Network . . . 41
11 FRITZ!Box as an Internet Router . . . . . . . . . . . . . . . . . . . 43
11.1 Parental Controls: Access Profiles for Internet Use . . . . . . . . . . . . . 43
11.2 Port Forwarding: Making Computers Accessible from the Internet. 50
11.3 Dynamic DNS: Name instead of IP Address . . . . . . . . . . . . . . . . . . . 53
11.4 Access from the Internet via HTTPS, FTP and FTPS. . . . . . . . . . . . . . 54
11.5 Prioritization: Right of Way for Internet Access . . . . . . . . . . . . . . . . 55
11.6 VPN: Remote Access to the Home Network . . . . . . . . . . . . . . . . . . . 58
11.7 Freely Selectable DNS Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
11.8 DNSSEC: Security for DNS Queries . . . . . . . . . . . . . . . . . . . . . . . . . . 60
11.9 IPv6: The New Internet Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
11.10 LISP: FRITZ!Box as a LISP Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
12 FRITZ!Box as a Wireless Access Point . . . . . . . . . . . . . . 67
12.1 Switching the Wireless Radio Network On and Off by Schedule. . . 67
12.2 Extending a Wireless LAN Network . . . . . . . . . . . . . . . . . . . . . . . . . . 68
12.3 Wireless LAN—Getting Technical . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

FRITZ!Box 4020 4
13 FRITZ!Box Connects Network Devices . . . . . . . . . . . . . . 74
13.1 Network Settings in the FRITZ!Box . . . . . . . . . . . . . . . . . . . . . . . . . . 74
13.2 Obtaining an IP Address Automatically . . . . . . . . . . . . . . . . . . . . . . 81
14 Connecting USB Devices to the FRITZ!Box. . . . . . . . . . . 84
14.1 Power Supply for USB Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.2 USB Devices on the FRITZ!Box. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
14.3 Using USB Devices Safely . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
14.4 Configuring Access Rights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
14.5 Accessing USB Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
14.6 Enable Energy-saving Mode for USB Hard Drives . . . . . . . . . . . . . . 87
14.7 Sharing a USB Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
15 Managing Memory with FRITZ!NAS . . . . . . . . . . . . . . . . 91
15.1 Requirements for FRITZ!NAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
15.2 Starting FRITZ!NAS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
15.3 FRITZ!NAS Password Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
16 Configuring Internet Access for Guests . . . . . . . . . . . . . 93
16.1 Wireless Guest Access: Private Hotspot . . . . . . . . . . . . . . . . . . . . . . 93
16.2 Configuring Guest Access on the LAN 4 Port . . . . . . . . . . . . . . . . . . 94
17 MyFRITZ!: Accessing the FRITZ!Box from Anywhere . . . 96
17.1 Configuring MyFRITZ! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
17.2 Using MyFRITZ! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
17.3 Security with MyFRITZ!. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
18 Push Services: Using Notification Services. . . . . . . . . 102
18.1 Available Push Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
18.2 Enabling Push Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
18.3 Configuring Push Services. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
19 Diagnostics: Checking Function and Security . . . . . . . 104
19.1 Checking FRITZ!Box Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
19.2 Checking the Security of the FRITZ!Box . . . . . . . . . . . . . . . . . . . . . 104

FRITZ!Box 4020 5
20 Saving and Restoring Settings . . . . . . . . . . . . . . . . . . . 106
20.1 Saving Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
20.2 Restoring Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
20.3 Restarting the FRITZ!Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
21 Taking FRITZ!Box Out of Operation. . . . . . . . . . . . . . . . 109
21.1 Deleting User Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
21.2 Uninstalling Supplementary Software . . . . . . . . . . . . . . . . . . . . . . 110
22 Help in Case of Errors . . . . . . . . . . . . . . . . . . . . . . . . . . 112
22.1 The User Interface Does Not Open . . . . . . . . . . . . . . . . . . . . . . . . . 112
22.2 Cannot Establish a Wireless LAN Connection . . . . . . . . . . . . . . . . 115
22.3 Wireless LAN Connection Interrupted. . . . . . . . . . . . . . . . . . . . . . . 117
23 Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . 118
23.1 Ports and Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
23.2 Router Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
23.3 User Interface and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
23.4 Device Properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
23.5 Cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
24 Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
24.1 FRITZ!Box Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
24.2 Information in the Internet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
24.3 Feedback on FRITZ!Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
24.4 Assistance from the Support Team . . . . . . . . . . . . . . . . . . . . . . . . . 122
Legal Notice. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Legal Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Manufacturer’s Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Declaration of CE Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Disposal Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Drilling Template. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

FRITZ!Box 4020 6
Safety Instructions
Before connecting the FRITZ!Box 4020, observe the following
security instructions in order to protect yourself and the
FRITZ!Box from harm.
•The FRITZ!Box has no on/off switch. Therefore it must al-
ways be possible to disconnect the FRITZ!Box from the
power supply.
–Insert the power supply unit of the FRITZ!Box into an
electrical outlet that is easy to reach.
•Overloaded outlets, extension cords and power strips
can lead to fires or electric shocks.
–Avoid using socket strips and extension cords if at all
possible.
–Do not connect multiple extension cords or socket
strips to each other.
•Damage to electric wiring or gas or water pipes during
drilling can present a significant danger.
–Before mounting the FRITZ!Box on the wall, make
sure that there are no electrical lines, gas or water
pipes located where you need to drill the holes. If
necessary, check the site with a pipe detector or con-
sult with qualified experts.
•Heat accumulation can lead to overheating of the
FRITZ!Box and subsequently damage the FRITZ!Box.
–Provide for sufficient air circulation around the
FRITZ!Box.
–Make sure that the ventilation slits on the FRITZ!Box
housing are always unobstructed.
–The FRITZ!Box should not be placed on a carpet or on
upholstered furniture.
–Do not cover the FRITZ!Box.

FRITZ!Box 4020 7
•The base of the FRITZ!Box can heat up during normal op-
eration. This heat can cause damage to heat-sensitive
surfaces.
–Do not place the FRITZ!Box on heat-sensitive surfac-
es.
•During electrical storms, lightning and electrical surges
present a danger to connected electrical devices.
–Do not install the FRITZ!Box during an electrical
storm.
•Moisture and liquids that find their way into the
FRITZ!Box can cause electric shocks or short circuits.
–Only use the FRITZ!Box indoors.
–Never let liquids get inside the FRITZ!Box.
•The FRITZ!Box contains hazardous components and
should only be opened by authorized repair technicians.
–Do not open the FRITZ!Box housing.
–If the FRITZ!Box needs to be repaired, please take it
to a specialized vendor.
•Dust, moisture and vapors as well as caustic cleaners or
solvents can damage the FRITZ!Box.
–Protect the FRITZ!Box from dust, moisture and fumes.
–Remove FRITZ!Box from the mains before cleaning.
–Clean FRITZ!Box with a slightly moist, lint-free cloth.

FRITZ!Box 4020 8
Conventions in the Manual
This manual uses the following symbols and emphases:
•Quotation marks designate elements and features in the
user interface and paths.
Example
Select “System / Push Service” and click “Sender”.
•Pointed brackets mark wild cards.
Example
To edit the device called <Name>, click the “Edit” button.
•Bold type in the text emphasizes important words.
Example
Do not leave the page without saving.
•Blue font in the text designates links and references
within this manual and addresses to be entered in the
browser.
Example
See also the information on page 8.
This symbol marks useful hints and tips.
This symbol indicates important instructions that must be
observed to avoid malfunctions.

The FRITZ!Box 4020
FRITZ!Box 4020 9
1TheFRITZ!Box4020
Welcome! We are pleased you decided on a FRITZ!Box. The
FRITZ!Box 4020 is the hub of your home network, connecting your
computers and network devices with the Internet. The FRITZ!Box is not
connected directly with your Internet connection, but to your modem
or router.
The FRITZ!Box is equipped with ports for computers and USB devices
and supports wireless LAN technology. You can use the FRITZ!Box as a
wireless access point for wireless devices like computers, notebooks,
tablets or smartphones.
The FRITZ!Box integrates connected computers and network devices
into your private home network. The devices can exchange data with
each other and enjoy shared access to USB hard drives, USB printers
and other USB devices. The FRITZ!Box transmits music, video and im-
age files to suitable playback devices in the home network.
Settings for the FRITZ!Box and for your private network are configured
in an easy-to-use user interface. The user interface can be opened in
any web browser. Wizards guide you step by step through the setup of
the most important FRITZ!Box functions, and comprehensive Help is
available on every page.
This manual assists you in connecting, configuring and operating your
FRITZ!Box. Its purpose is not only to introduce to you the many func-
tions of the FRITZ!Box, but also to familiarize you with some of the
technical context.

FRITZ!Box 4020 10
Ports, Interfaces, Buttons and LEDs
2 Ports, Interfaces, Buttons and LEDs
This chapter describes the ports, interfaces, buttons and LEDs of the
FRITZ!Box.
2.1 Ports and Interfaces
Possibilities for connecting the FRITZ!Box
•WAN
Socket for connecting to a modem or a router
•LAN 1 – LAN 4
4 Ethernet ports (10/100 Base-T) for connecting comput-
ers and other network devices like game consoles and
network hubs
•USB
USB 2.0 port for connecting USB devices like printers or
storage media
•Wireless access point
Integrated wireless access point for connecting to wire-
less LAN devices that use the radio standard
IEEE 802.11b, IEEE 802.11g or IEEE 802.11n in the
2.4-GHz frequency band
WLAN N
2.4 GHz
Notebook, computer, smartphone,
video/TV streaming
4 x Fast Ethernet
LAN, 100 Mbit/s, computer,
game console, network
Printer, storage media,
UMTS/HSPA/LTEstick and USB devices
1 x USB 2.0
Connection to cable/DSL/
fiber optic modem or network
WAN
Internet

Buttons
FRITZ!Box 4020 11
2.2 Buttons
The FRITZ!Box has two buttons on the top of the housing.
FRITZ!Box buttons
Button Functions
“WLAN” Button
With the “WLAN” button on the FRITZ!Box you can switch the
wireless network on and off.
“WPS” Button
With the “WPS” button you can establish a wireless LAN con-
nection via WPS; see Establishing a Wireless LAN Connection
Using WPS from page 20.
Locking the Buttons on the FRITZ!Box
You can lock the buttons on the FRITZ!Box. Locking the but-
tons prevents the settings for your FRITZ!Box or your home
network from being changed unintentionally or without au-
thorization.
Example
With the “WLAN” button the wireless network of the FRITZ!Box
can be switched off at the touch of a button. If this happens
by accident, in some cases it may take some time before the
cause is found and the wireless LAN radio network can be re-
stored to all FRITZ!Box users in the home network.
WLAN
Internet
Power
LAN
Info
WPS
WPS WLAN
WLAN
WLAN
I
nternet
P
o
w
e
r
L
AN
I
n
f
o
WPS
WPS
WPS
WPS
W
L
A
N
W
L
A
N
W
L
A
N
W
L
A
N
WLAN
Internet
Power
LAN
Info
WPS
WPS WLAN
WLAN

FRITZ!Box 4020 12
LEDs
The button lock is configured in the FRITZ!Box user interface,
in the “System / Buttons and LEDs” menu on the “Keylock”
tab.
2.3 LEDs
The FRITZ!Box 4020 has five LEDs, which flash or light up to
display various connection statuses and events.
For the “Info” LED you can assign any event desired in addi-
tion to the preset events. For more information, read
Assigning Any Event to the “Info” LED on page 12.
Assigning Any Event to the “Info” LED
The “Info” LED on the upper panel of the FRITZ!Box signals
various events. Some events for which the “Info” LED flashes
or lights up are preset in the FRITZ!Box. You also have the op-
tion of assigning any other event to the “Info” LED.
1. Open the FRITZ!Box user interface; see page 24.
2. In the menu “System / Buttons and LEDs”, click the
““Info” Display” tab.
3. In the “Freely Selectable Options” area, select from the
““Info” LED” list the additional event which is to be as-
signed to the LED.
4. Then click the “Apply” button.
The “Info” LED now flashes not only for the preset events, but
also for the event you selected.

Before You Connect the FRITZ!Box
FRITZ!Box 4020 13
3 Before You Connect the FRITZ!Box
•Read the security instructions on page 6.
•Check the contents of your FRITZ!Box package. See page 13 to find
out what is included in the package.
•Make sure that the requirements for operating the FRITZ!Box have
been met; see page 13.
•Read the handling instructions for your FRITZ!Box on page 14
•Note the tips for passwords on page 15.
3.1 Contents of the FRITZ!Box Package
•FRITZ!Box 4020
•one power supply unit
•one network cable
•one quick guide
3.2 Requirements for Operation
In order to operate the FRITZ!Box, you must have the follow-
ing:
•an up-to-date web browser
Some of the FRITZ!Box functions can be used only with a
web browser that supports HTML5, for instance Firefox
version 17 or higher, Internet Explorer version 9 or high-
er, or Google Chrome version 23 or higher.
•for the Internet connection:
one Internet connection with a modem or router
•for the wireless LAN connection to tablets, smartphones
and computers:
Tablets, smartphones or computers that support wire-
less LAN compliant with IEEE 802.11n, IEEE 802.11g or
IEEE 802.11b. Computers that do not have wireless LAN

FRITZ!Box 4020 14
Handling the FRITZ!Box
integrated can be equipped with wireless LAN support
by installing a wireless LAN device, like a
FRITZ!WLAN USB Stick, for instance.
•for connecting computers using network cables:
computer with a network port (network adapter standard
Ethernet 10/100 Base-T)
3.3 Handling the FRITZ!Box
•Read the Safety Instructions from page 6.
•You can place the FRITZ!Box on a horizontal surface or
mount it on a wall. For a drilling template to mount the
FRITZ!Box on a wall, see page 126.
•Place or hang the FRITZ!Box in a dry location that is free
of dust and protected from direct sunlight.
•For ideal operating conditions, mount the FRITZ!Box on a
wall with the cables connected on the bottom.
•When connecting the FRITZ!Box to your computer using a
network cable, keep in mind that the cable can be no
longer than 100 m.
•Make sure to keep sufficient distance from potential
sources of interference like microwave devices or elec-
tric devices with large metal housings.

Tips for Passwords
FRITZ!Box 4020 15
3.4 Tips for Passwords
Passwords are assigned at various places in the user inter-
face to protect your settings and data in the FRITZ!Box. The
FRITZ!Box assists you in assigning secure passwords, for in-
stance when creating new users or configuring MyFRITZ!: A
graphic display indicates how secure the password is. Note
the following:
•Use a password rated as highly secure.
•Select a password with at least twelve characters, which
includes capitals and lower-case letters as well as nu-
merals and special characters.
•Under the search term “Characters for Passwords” the
Help of the FRITZ!Box user interface contains more infor-
mation about which characters you can use.
•Be sure to keep your passwords in a safe place!
•Configure the “Forgot Password” push service. This noti-
fication service sends you an access link at regular inter-
vals, with which you can access the FRITZ!Box user inter-
face even if you have forgotten your password. See Push
Services: Using Notification Services from page 102.
•If you lose your password for the user interface, you will
have to restore the factory settings to the FRITZ!Box and,
for reasons of security, reconfigure all of your personal
settings for your Internet connection, your telephone
system and your home network. See Forgot Password—
What to Do on page 35.

FRITZ!Box 4020 16
Connecting the FRITZ!Box
4 Connecting the FRITZ!Box
•Before you connect the FRITZ!Box, read the instructions on Safety
Instructions from page 6.
•Connect the FRITZ!Box to the power supply.
•Connect the FRITZ!Box to your Internet connection.
4.1 Connecting to Electrical Power
Connecting to the power supply
1. Pick up the power supply unit included in the FRITZ!Box
package.
Use only this power supply unit for connecting to electri-
cal power.
2. Connect the power supply unit to the socket on the
FRITZ!Box labeled “Power”.
3. Plug the other end into an AC power outlet.
After a few seconds the “Power” LED stops flashing and re-
mains on.
4.2 Connecting to the Internet
The FRITZ!Box 4020 can be connected using various types of
Internet connections:
•to a cable modem
•to a router
•to an ADSL or a VDSL modem
•to a fiber optic modem (FTTH-ONT/media converter)
•via mobile network
Info
Internet
WLAN
LAN
Power
WLAN
WLAN
WPS
WPS
1
LAN 1
LAN
2
LAN 2
LAN
3
LAN 3
LAN
4
LAN 4
Power
Power
WAN
WAN

Connecting to the Internet
FRITZ!Box 4020 17
Connecting with a Modem or Router
Connection to modem or router
1. Connect the network cable (white) to the “WAN” port on
the FRITZ!Box.
2. Connect the other end of the network cable to a LAN port
on the router or modem.
The “Internet” LED begins flashing.
Info
Internet
WLAN
LAN
Power
WLAN
WLAN
WPS
WPS
1
LAN 1
LAN
2
LAN 2
LAN
3
LAN 3
LAN
4
LAN 4
Power
Power
WAN
WAN

FRITZ!Box 4020 18
Connecting a Computer with a Network Cable
5 Connecting a Computer with a Network Cable
You can connect computers and other network devices with the
FRITZ!Box using a network cable.
5.1 Connecting to the Computer
One computer or other network device can be connected to
each LAN port of the FRITZ!Box.
Connecting a computer using a network cable
1. Insert the network cable included in the package into
the LAN port of the computer.
You can also use any other network cable. For more in-
formation, see page 120.
2. Insert the free end of the cable into a LAN socket on the
FRITZ!Box.
Now the FRITZ!Box and the computer are connected with each
other.
Info
Internet
WLAN
LAN
Power
WLAN
WLAN
WPS
WPS
1
LAN 1
N
N
2
LAN 2
LAN
3
LAN 3
LAN
4
LAN 4
Power
Power
WAN

Connecting a Network Hub or Switch
FRITZ!Box 4020 19
5.2 Connecting a Network Hub or Switch
You can connect a network hub or network switch to the
FRITZ!Box.
1. Insert the network cable included in the package into
the uplink port of the network hub or network switch.
You can also use any other network cable. For more in-
formation, see page 120.
2. Insert the free end of the cable into a LAN socket on the
FRITZ!Box.
The FRITZ!Box and the network hub are now connected with
each other.
Info
Internet
WLAN
LAN
Power
WLAN
WLAN
WPS
WPS
1
LAN 1
LAN
2
LAN 2
LAN
3
LAN 3
LAN
4
LAN 4
Power
Power
WAN

FRITZ!Box 4020 20
Connecting Devices with the FRITZ!Box over Wireless LAN
6 Connecting Devices with the FRITZ!Box over Wireless
LAN
Computers and other devices with wireless LAN, for instance smart-
phones and network printers, can be connected wirelessly with the
FRITZ!Box.
You can establish the wireless LAN connection using WPS or by enter-
ing the FRITZ!Box network key on the wireless device.
Mobile devices with a camera, like smartphones or tablets, can scan
the QR code of the wireless LAN network key to establish a wireless
LAN connection.
6.1 Establishing a Wireless LAN Connection Using WPS
WPS is a procedure for establishing secure wireless LAN con-
nections. With WPS, connecting a wireless device with the
FRITZ!Box is quick and easy.
Requirements
The wireless device must support WPS.
Establishing a Connection on a Windows Computer
Using WPS
Here is how to establish a wireless connection with WPS on a
computer with Windows 8.1, 8, 7 or Vista:
1. If the “WLAN” LED on the FRITZ!Box is off, press the
“WLAN” button briefly.
The wireless radio network of the FRITZ!Box will be
switched on.
2. Open the wireless LAN software on the computer.
In Windows 8 and 7, for instance, click the wireless LAN
icon in the task bar.
3. Select the wireless radio network of the FRITZ!Box.
The preconfigured name of the wireless radio network
(SSID) is consists of “FRITZ!Box 4020” and two capital
letters, and is printed on the bottom of the housing.