DNS Leak Test

DNA Leak Test - Are You Completely Anonymous?

A VPN is often used to hide your IP address in order to surf anonymously on the Internet. However, a wrong configuration by the user or the VPN software can lead to a leak of the original IP address or other sensitive information. The EXPERTE.com DNS Leak Test checks whether your DNS requests are sent to a secure DNS server.

Note: For the test to produce meaningful results, you must be connected to a VPN.

What is a DNS Leak?

The Domain Name System (DNS) is responsible for resolving an Internet address like www.experte.com into the corresponding IP of the web server. Therefore, when you visit a website, your computer sends a query to a DNS server (name server), which responds with the appropriate IP address.

If your computer now sends the DNS queries to a DNS server that does not belong to the VPN provider, this DNS server will find out all the websites you have visited. Since the DNS protocol is also largely unencrypted, this data can also be monitored during transmission.

What Information Is Leaked?

A DNS leak tells the DNS provider which Internet addresses are contacting you. This way he knows

  • which websites you visit
  • which files you download
  • which online services you use

How Does the DNS Leak Test Work?

To determine whether you are affected by a DNS leak, we carry out the following steps.

  1. We make a total of 5 requests from your browser to random subdomains controlled by us (e.g. r5ymkun1.experte.com).
  2. Your computer tries to determine the IP associated with these random domains and makes a request to its DNS server.
  3. We receive the DNS request and now know the IP address of your DNS server.
  4. We compare the owner of your IP address with the owner of your DNS server. If these data do not match, there may be a DNS leak.
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