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WAS BEDEUTET DNS?

DNS stands for "Domain Name System", and its purpose is to convert website names
into IP addresses. Each time you go to a website, your browser sends a DNS query
to a DNS server to figure out the IP address of the website. Und ein normaler
DNS-Auflösungsdienst liefert einfach die IP-Adresse der angeforderten Domain.

NOTE

The default DNS server is usually provided by your ISP. This means that your ISP
can track your online activity and sell logs to third parties.



There are also DNS servers that can block certain websites at DNS-level. How do
they work? When your device sends a "bad" request, be it an ad or a tracker, a
DNS server prevents the connection by responding with a non-routable IP address
for a blocked domain.


WHY USE DNS FOR CONTENT BLOCKING

Absolutely everything is connected to the Internet these days, from TV to smart
light bulbs, from mobile devices to smart auto. And where the Internet is, there
are ads and trackers. In this case, a browser-based ad blocker has proven
insufficient. To get a better protection, use DNS in combination with VPN and ad
blocker.

Using DNS for content blocking has some advantages as well as obvious flaws. On
the one hand, DNS has no blind spots since it observes all devices and not just
the browsers. But, on the other hand, DNS blocking alone cannot provide cosmetic
filtering.


WHAT IS ADGUARD DNS?

AdGuard DNS is one of the most privacy-oriented DNS services on the market. It
supports such reliable encryption protocols as DNS-over-HTTPS, DNS-over-TLS, and
DNS-over-QUIC. It can work as a regular DNS resolver in Non-filtering mode, but
also it can provide DNS-level content blocking: identify requests to ad,
tracking, and/or adult domains (optionally), and respond with an empty response.
AdGuard has its own base of domain names that serve ads, trackers, and fraud,
and it is regularly updated.



About 75% of AdGuard DNS traffic is encrypted. This is actually what
differentiates content-blocking DNS servers from others. If you take a look at
CloudFlare or Quad9 stats, you’ll see that encrypted DNS is just a small share
of all queries.

AdGuard DNS exists in two main forms: public AdGuard DNS and private AdGuard
DNS. Both of these services do not require installing any apps. They are easy to
set up and use, and provide users with the minimum features necessary to block
ads, trackers, malicious websites, and adult content (if required). There are no
restrictions on what devices they can be used with.

Despite so many similarities, private AdGuard DNS and public AdGuard DNS are two
different services. Their main difference is that you can customize private
AdGuard DNS, while public AdGuard DNS cannot.


DNS FILTERING MODULE IN ADGUARD PRODUCTS

All major AdGuard products, including AdGuard VPN, have a DNS filtering module
where you can select a DNS server by a provider you trust. Of course, AdGuard
DNS Default, AdGuard DNS Non-filtering and AdGuard DNS Family Protection are on
the list. Also, AdGuard apps allow users to easily configure and use AdGuard DNS
— public or private.

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DNS-Filterung
 * Was bedeutet DNS?
 * Why use DNS for content blocking
 * What is AdGuard DNS?
 * DNS filtering module in AdGuard products

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