DNS Observer

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About DNS Observer

DNS-Observer is a web service that provides clients with various information about DNS resolvers.

The main purpose of the project is to investigate the trust issue in the chaotic internet ecosystem where many actors such as DNS resolvers, internet service providers, hosting providers, etc. play a role and to raise awareness about privacy.

The current system only provides visitors with information about the IP addresses of DNS resolvers and the owners of these IP addresses. Under normal conditions, that is, if you have not intentionally changed your DNS resolver, your DNS resolvers and your Internet exit IP should be on the same Internet service provider’s network. Using this tool, you can compare the IP address you receive on each network you connect to and the owner of your DNS resolver, and detect a possible DNS hijacking situation.

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DNS Observer cannot guarantee security and reliability!

DNS Observer only provides you with information about the DNS resolver of the network you are connected to. It is left to the visitor to decide whether the resolver is trustworthy.

DNS Observer is designed to examine different DNS resolvers that you can receive service from when you are connected to different networks (public or corporate). Therefore, it does not provide certainty about whether you are receiving service from your preferred DNS resolver. Another issue is that if you define Google DNS (8.8.8.8 and 8.8.4.4) as your DNS resolver, you will not see the same addresses in DNS Observer. The main reason for this can be explained as Google not having a single DNS resolver server. Google manages a set of geographically distributed DNS servers. All of these servers respond to the 8.8.8.8 and 8.8.4.4 IP addresses, but they may be making recursive DNS queries with a second IP address. In this case, DNS Observer will show you this secondary IP address.

Web UI: Using with Web Browser

Try on Web Browser DNS-Observer

CLI: Command Line Interface

DNS-Observer now has a command line interface.

You can check the resolvers on the network of the server you are connected to by using the following command.

curl -s https://dns-observer.dnssec.org.tr | sh

or explicitly:

curl -b -X https://dns-observer.dnssec.org.tr/cli -L