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Page 156 / 197 Scroll up to view Page 151 - 155
156
Fixed IP Addresses When the DHCP Server Is Enabled
Fixed IP Addresses When the DHCP Server Is Enabled
If you would like to configure fixed IP addresses on indi-
vidual computers connected with the FRITZ!Box despite
the enabled DHCP server, please note the following:
•
The IP addresses must be from the IP network of the
FRITZ!Box.
•
The IP addresses may not come from the address
range of the DHCP server.
•
Each IP address can be assigned only once.
Disabling the DHCP Server
You can disable the DHCP server.
To make sure that all computers remain in the same IP net-
work as the FRITZ!Box, you must enter the IP addresses
manually in the computers' network settings. First disable
the option
“
Obtain an IP address automatically” and then
enter the IP address manually in the appropriate field.
In the case of the preset IP address of the FRITZ!Box, the
following IP addresses are available for assignment to the
computers:
Each IP address can be assigned only once.
3.6
Subnetwork
By default the option “All computers are located in the
same IP network” is enabled in the FRITZ!Box.
If the factory settings were not changed, this setting has
the following effect:
The DHCP server of the FRITZ!Box assigns all of the com-
puters connected with the FRITZ!Box an IP address from
the address range of the DHCP server.
This means that all of the computers connected with the
FRITZ!Box are located in the same IP network.
192.168.178.2 - 192.168.178.254
Page 157 / 197
Disabling “All computers are located in the same IP network”
157
Disabling “All computers are located in the same IP
network”
If you switch off the setting “All computers are located in
the same IP network”, the interfaces of the FRITZ!Box will
receive their own IP addresses.
Factory Settings
Upon delivery the interfaces of the FRITZ!Box are config-
ured as follows:
Thus the following address pools are available to the
DHCP server:
Computers connected with the FRITZ!Box via different in-
terfaces are located in different IP networks.
Interface
IP Address
Subnet Mask
DHCP Server
LAN 1
192.168.178.1 255.255.255.0 enabled
LAN 2
like LAN 1
255.255.255.0 enabled
LAN 3
like LAN 1
255.255.255.0 enabled
LAN 4
like LAN 1
255.255.255.0 enabled
WLAN
192.168.182.1 255.255.255.0 enabled
Interface
Address Pool of the DHCP Server at the
Interface
LAN 1
192.168.178.20 - 192.168.178.200
LAN 2
like LAN 1
LAN 3
like LAN 1
LAN 4
like LAN 1
WLAN
192.168.182.20 - 192.168.182.200
Interface
Network Address of the IP Network
LAN 1
192.168.178.0
LAN 2
like LAN 1
LAN 3
like LAN 1
LAN 4
like LAN 1
WLAN
192.168.182.0
Page 158 / 197
158
Changing the Network Settings
3.7
Changing the Network Settings
In order to change the network settings of the FRITZ!Box,
the expert mode must be enabled in the user interface:
1.
Start a web browser on your computer and enter
fritz.box
in the address field of the browser.
2.
Click
“
Expert Mode” in the “System” menu, enable
the setting
“
Show expert settings” and confirm this
setting by clicking
“
Apply”.
Here is how to change the network settings:
1.
Select the
“
Home Network / Network” menu.
2.
Select the
“
Network Settings” tab.
3.
Click the
“
IP Addresses” button.
The
“
IP Settings” page is opened.
4.
Once all desired changes to the settings have been
configured, confirm by clicking
“
OK” to apply them.
Please note that changes to the network settings in the
FRITZ!Box may make it necessary to adjust the network
settings of your computers so that you can continue to ac-
cess the FRITZ!Box user interface.
Page 159 / 197
More about Internet Telephony
159
4
More about Internet Telephony
Voice over IP (VoIP)
Internet telephony has already been in use for years, but
today it allows even private customers the convenience fa-
miliar from conventional telephony, usually at significant-
ly lower prices.
Internet telephony has also made it considerably more
convenient to use applications like conference calls and
answering machines in networks. Further advantages in-
clude global availability at a single telephone number,
and the development of new standards for security and
voice quality.
Data Transfer
All kinds of data transmission in the Internet use the Inter-
net Protocol (IP). IP is packet-oriented. This means that
the data are broken down into data packets for transmis-
sion and IP takes care of the transport of the individual da-
ta packets through the Internet. Language is also trans-
mitted in the Internet in this manner.
In opposition to this, fixed-line telephony transmits data
in a line-oriented manner. In this case data are transmit-
ted in a coherent data stream.
4.1
Telephony Scenarios
If you have configured both a fixed-line number and an In-
ternet telephone number in FRITZ!Box, you can make calls
in all directions:
•
from the fixed-line network into the fixed-line net-
work
•
from the Internet into the fixed-line network
•
from the Internet into the Internet
and receive calls from all directions as well.
Page 160 / 197
160
More about: Virtual Private Network (VPN)
5
More about: Virtual Private Network (VPN)
Via VPN a secure remote access to the network of the FRITZ!Box can be
established.
•
The VPN solution for the FRITZ!Box is based on the IPSec standard.
•
Computer-LAN coupling and LAN-LAN coupling: VPN connections
can be set up for individual remote computers or even for remote
networks.
•
Eight simultaneous active VPN connections are supported.
•
The configuration files for the VPN connections are created using a
separate program. The program is provided free of charge and can
be downloaded from the AVM web site.
•
A free VPN client for individual computers can also be downloaded
from the AVM web site.
The chapter is a short introduction to the topic of VPN. The
AVM web site offers an English-language Service Portal
which presents comprehensive information on VPN in
general and in connection with the FRITZ!Box. Visit this
portal to obtain more detailed information.
www.avm.de/en/vpn
5.1
What Is VPN?
VPN stands for Virtual Private Network. A VPN is a virtual,
private network that uses the Internet as its physical base.
The VPN provides for secure data transmission.
All computers registered in the network are connected
with each other over the Internet so that they can
exchange data. Data transmission takes place over IP, as
in the local network. In a pure transmission over IP the
data are not protected and thus exposed to unauthorized
access by third parties.
Security in a VPN is ensured by transmitting the data en-
crypted via what is known as a tunnel. This excludes the
possibility of unauthorized access to the data. The tunnel
is the logical, virtual connection.

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