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Freely Selectable DNS Servers
FRITZ!Box 7490 95
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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