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Prioritization: Right of Way for Internet Access
FRITZ!Box 7490
91
Prioritized Applications
This category is suitable for applications that require a fast re-
action time (for example, company access, terminal applica-
tions, games).
For network applications prioritized in this category,
90% of the FRITZ!Box’s upload bandwidth is available,
as long as no application from the “Real-time applica-
tions” category requires bandwidth. The remaining 10%
of the upload bandwidth is available for applications
that are prioritized in lower categories or not prioritized
at all.
If multiple network applications are assigned to the “Pri-
oritized applications” category, then they must share
the available capacity.
Background Applications
This category is suitable for applications that do not require
any high transmission speed and which are not time-critical
(for example, peer-to-peer services or automatic updates).
Network applications assigned to this category are al-
ways treated with the lowest priority when the Internet
connection is working at full capacity. So whenever an
application from a different category or a non-prioritized
application requires the entire bandwidth, all back-
ground applications must wait until bandwidth capacity
becomes available again.
If no other network applications are active, then the
background applications receive the entire bandwidth.
Page 92 / 197
FRITZ!Box 7490
92
Prioritization: Right of Way for Internet Access
Prioritization Method in the FRITZ!Box
The following techniques are used in the FRITZ!Box to send
data packets according to their prioritization:
Change in the order in which packets are sent to the
Internet (upstream direction)
The order of the packets the FRITZ!Box receives from the
Internet (downstream direction) cannot be changed.
Discard low-priority packets in order to ensure the trans-
mission of higher-priority packets. This technique is
used whenever more packets are supposed to be sent to
the Internet than the upstream transmission rate of the
Internet connection allows.
As long as no packets are being sent from higher-priority
applications, the full transmission rate of the Internet
connection is available for low-priority packets.
Configuring Prioritization in the FRITZ!Box
1.
Open the FRITZ!Box user interface, see
page 32
.
2.
Enable the advanced view.
3.
Configure prioritization in the “Internet / Filters / Prioriti-
zation” menu.
Page 93 / 197
VPN: Remote Access to the Home Network
FRITZ!Box 7490
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14.6
VPN: Remote Access to the Home Network
Via a VPN (Virtual Private Network) a secure remote access to
the network of the FRITZ!Box can be established.
VPN in the FRITZ!Box
Configuring VPN in the FRITZ!Box
1.
Open the FRITZ!Box user interface, see
page 32
.
2.
Enable the advanced view.
3.
Select the “Internet / Permit Access” menu.
4.
Select the “VPN” page.
See also the Help available in the FRITZ!Box user interface for
assistance in configuring VPN.
IPSec
VPN in the FRITZ!Box is based on the IPSec
standard.
Computer-LAN
Computer-LAN linkup: VPN connections can
be configured for individual remote com-
puters.
LAN-LAN
LAN-LAN linkup: VPN connections can be
configured for remote networks.
Eight simultaneous
connections
FRITZ!Box supports a maximum of eight si-
multaneous VPN connections.
Configuration software
The configuration files for the VPN connec-
tions are created using a separate program.
The program is provided free of charge and
can be downloaded from the AVM web site.
FRITZ!Box user
For FRITZ!Box users who have the right to
access the FRITZ!Box via VPN, no further
settings must be configured. All required
VPN settings are included in the user ac-
count.
VPN client
A free VPN client for individual computers
can also be downloaded from the AVM web
site.
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FRITZ!Box 7490
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VPN: Remote Access to the Home Network
Supplementary Software for VPN
All of the information required for a VPN is saved in a configu-
ration file. The terminals involved in any VPN must receive
this file.
Individual computers that are networked over a VPN require a
VPN client.
The “Configure FRITZ!Box VPN Connection” Wizard
AVM provides the “Configure FRITZ!Box VPN Connection”
software for creating configuration files. This program is
a Wizard that takes you step by step through the VPN
configuration. All of the necessary VPN settings, like the
encryption method and access rules, are set automati-
cally. The resulting configuration files must be imported
to the terminals of the VPN tunnel. At the terminal with
the FRITZ!Box the configuration file is then imported to
the FRITZ!Box. The VPN parameters in these files can be
adjusted manually to connect to products by other man-
ufacturers.
The “FRITZ!VPN” VPN client
AVM offers the “FRITZ!VPN” software as a VPN client.
Both the Wizard and the client can be downloaded free of
charge from the AVM VPN service pages:
en.avm.de/service/vpn/overview
.
Page 95 / 197
Freely Selectable DNS Servers
FRITZ!Box 7490
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14.7
Freely Selectable DNS Servers
DNS servers are preset in the FRITZ!Box for IPv4 and IPv6.
These are the DNS servers assigned by the Internet service
provider.
For both IPv4 and IPv6, the preset DNS server can be replaced
by a free DNS server. Free DNS servers include, for instance,
OpenDNS and Google DNS.
Here is how to change the DNS server entry:
The “DNSv6” page is displayed only if you enabled IPv6 sup-
port for the FRITZ!Box on the “IPv6” page.
1.
Open the FRITZ!Box user interface, see
page 32
.
2.
Enable the advanced view.
3.
Change the settings for the DNS servers.
14.8
DNSSEC: Security for DNS Queries
DNSSEC is short for Domain Name System Security Exten-
sions. As the name says, this is an extension of DNS, the do-
main name system.
DNSSEC ensures that both the DNS server and the informa-
tion returned by the DNS server are authentic, or genuine.
Security with DNSSEC
When a home user surfs the web, she or he sends queries to
the Internet by entering URLs in the address line of the brows-
er. A URL is the name of a web site that is easy to remember,
for instance
en.avm.de
. Every query is sent to the DNS server
first. The DNS server resolves the URL into the corresponding
IP address. There is one unambiguous IP address for every
URL.
The home user relies on the authenticity of the IP address re-
turned by the DNS server. Authentic means that the response
is the IP address of the desired web site, and not a faked IP
address that leads to a fake web site. DNSSEC can ensure that
the returned addresses are authentic.

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