Check your VPN DNS test tool legitimacy: Is it “legit” or deceptive

Does your VPN leak DNS data? Does the DNS testing tool you’re using shows actual or sponsored results for affiliate marketing?

Does your VPN leak DNS data? Does the DNS testing tool you’re using shows actual or sponsored results for affiliate marketing?

Virtual private network (VPN) users are increasing at a great pace due to growing privacy concerns and numerous VPN options, including both paid and free. But many of us make the wrong choice and choose VPNs with data leaks. Unfortunately, VPN data leaks are hidden, and you cannot spot them without testing through proper tools.

In the testing phase, some tools may also provide unauthentic and misleading information. In this article, we will show how some tools could misguide you and how you can spot any unauthentic information.

Let’s start!

What is DNS and DNS Leak?

DNS functioning is complex and there could be a detailed explanation for its working. But the basic purpose of the DNS system is simple.

DNS works like a phonebook for the internet and intermediary between the user’s device and browsers. When a user searches for information through domain names – such as – the browser interacts with the DNS server which translates the domain names into IP addresses. The DNS server is a necessary element because browsers can only process IP addresses to load internet resources.

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Now, with the VPN connection, the ISP DNS server (which is the default server in most devices) is switched with anonymous VPN DNS. Through this process, it is ensured that the user’s browsing activity and identity remain hidden from the ISP and other internet entities. Unfortunately, due to VPN vulnerability and because of other issues, your VPN could be leaking BNS while in use.

DNS leak occurs when VPN is connected to conceal DNS requests but due to certain reasons, these requests reach ISP DNS instead of going to the anonymous DNS server. You can spot DNS leak issues with some testing tools, but unfortunately, DNS testing is also being used to promote VPN providers.

Analyzing Results to Spot Deceiving Tool

There is no doubt that the DNS test tool is the best way to catch data leaks way before any serious data theft or exploit occurs. However, you can get confusing results while using some of the testing tools. Here are the two probable reasons for misleading DNS results;

  • The tool you are using owns a VPN service that they might promote through DNS leak results.
  • Any tool that is sponsored or paid by a VPN provider could manipulate results for gaining a higher commission through more conversions.

But, it is not necessary that a tool with any of the characters mentioned above is always involved in providing deceptive results. To keep everything easy and simple for readers, here is how to analyze the DNS test results and figure out the dubious data.

Step 1: Check your real DNS IP without connecting a VPN. You can do this with any DNS leak tool.

Step 2: Connect your VPN and perform a DNS test with any tool.

Step 3: Wait until the testing process completes.

Now look at the results and see your VPN DNS information. If the results contain DNS IP and location according to your connected VPN server, your DNS is not leaking. But, if you find any information matching your real IP, location or ISP then your VPN might be leaking DNS data.

But the question is, where do people get confused?

People get confused when results show up, but there is an alert sign (usually indicated by red) stating that your VPN is leaking the DNS data. Usually, users simply look at this notification without analyzing the information.

See: Don’t ever use a VPN without paying attention to these five things

Keep in mind that your real data could not be accessed if your VPN is working the way it should; therefore, the testing tool could only show a wrong notification of danger but the displayed IP will be of your VPN server.

Examples of Some DNS Results – Legitimate and Confusing  

We have performed DNS tests using some tools that are popular and appear in top results when searching for DNS leak test tools. In this section, we will highlight some confusing results. But, before that, we will compare these results with some authentic tools which display clear information.

Before getting to the result analysis, let us tell you that;

  • We will use two VPNs – ExpressVPN and PIA VPN – and test both with all available tools. Also, we will use the same server, ie. the US server to test DNS leak with every tool available.
  • There are test results from five tools including both authentic tools and misleading DNS tools.

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1 –

We have performed a DNS test with and find legitimate results. Although they advertise IVPN, they don’t display confusing results for promotions.

Here is the result.

With ExpressVPN

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You can see that the results are showing the US server and the IP for that location. This means the DNS is not leaking. But, the important thing to notice is that this tool doesn’t misguide or create an impact by displaying a result statement.

2 – DNS Leak Tool

With ExpressVPN, the DNS leak tool by VPNInsights shows a similar IP address as other tools. Also, we found nothing confusing or promotional.

Here is the result.

With ExpressVPN (US server)

Here, you can see the same VPN server IP which was being displayed by Also, the VPNinsights tool does not display a result statement so that users can judge the results on their own.


This tool is also a legitimate one without any misleading data or statements.

Here is the result.

With ExpressVPN (US Server) also displays authentic results without any misguiding information.


After going through the DNS leak tool by, it was noticed that they are advertising PIA VPN and also promoting it through misleading results.

With ExpressVPN (US Server)  With PIA VPN (US Server)
Here you can see that despite ExpressVPN IP (as displayed by other legitimate tools), is showing a danger sign by stating “Looks like your DNS might be leaking. When connected to PIA VPN, the same PIA IP (as displayed by other legitimate tools) is displayed with a secure sign.


5- DNS Leak Tool by ExpressVPN

With the ExpressVPN tool (, it was obvious that they have their own VPN service which is popular as well. Despite this fact, there were chances that the tool displays clear results without any misguidance.

With ExpressVPN (US Server)


With PIA VPN (US Server)



When connected to Express VPN, the same IP (as displayed by other legitimate tools) is displayed with a secure sign.



Here you can see that despite PIA VPN IP (as displayed by other legitimate tools), is showing a danger sign by stating “Looks like your DNS might be leaking.


Final Words

In this article, we have tried our best to provide well-researched information with clear examples. However, it is possible that the tools which we found misleading will work on their efficiency and remove any error in the future.

See: What If Your VPN Keeps Logs and Why You Should Care

Also, there could be other affiliate or promotional tools which are not discussed here as we have only focused the top results for testing DNS leak. Therefore, you should always analyze the DNS test results carefully while you are running a DNS leak test.

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