Buddha Jumping Wall: In addition to VPNs that leak data, DNS testing tools are not reliable.

In recent years, users have increasingly focused on privacy protection, so VPNs (whether free or paid) have become the key to many people's exposure to the online world. However, many people use the VPN to rush to the hospital, so the bad guys also have a bad idea, they are eyeing your data, and it is speechless that the data leakage on the VPN is sneaky, If you don't use tool testing, you can't find the hands and feet that hackers are doing behind the scenes.

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However, if you don't polish your eyes, you may use the wrong tool and the information you get is misleading. Let us tell you step by step how these unscrupulous tools mislead you, and of course teach you how to polish your eyes without being cheated.

What is DNS? What is the DNS leak?

The function of DNS is actually very complicated and it is a bit cumbersome to explain. What you need to know is that the basic purpose of the DNS system is simple.

DNS works like an Internet address book, which is an intermediary between a user device and a browser. When a user searches for information through a domain name, such as Hackread.com, the browser interacts with the DNS server, which translates the domain name into an IP address. The DNS server is essential in this step because the browser can only load Internet resources through an IP address.

With a VPN connection, the ISP DNS server (the default server for most devices) can "catch up" anonymous VPN DNS. This step ensures that the user's browser activity and identity are "invisible" in front of ISPs and other Internet entities. However, VPNs are too weak and your DNS may be compromised when using VPN or other privacy tools.

When a DNS leaks, the VPN is definitely connected to a hidden DNS request, but for some reason these requests are sent to the ISP DNS instead of the anonymous DNS server. Indeed, you can find DNS leaks through some testing tools, but some VPN sellers are taking advantage of this and using their testing tools to market their own products.