What is a DNS leak?

Do you think connecting to a VPN can keep your privacy all the time? Well, that depends on whether your VPN service provider can fully protect your device’s DNS queries. That means you should be able to hide everything inside the VPN tunnel. Otherwise, your information will be shared through a DNS leak.

But why should this happen when the whole point of getting a VPN is to give you end-to-end encryption capabilities to ensure that no one can decode your sensitive data at rest or in transit except the intended recipient?

In this post, we’ll look at DNS leaks and what you can do to detect and prevent them.

What is a DNS?

A DNS or domain name system is an Internet protocol that translates human-readable domain names (such as www.google.com) into a machine-readable code or IP address (such as 191.3.4.56) so that computers can recognize The ubication. accessed. An IP address is required for devices to communicate with each other. So, if you want to go to Google’s website, you don’t have to type a string of numbers (or the IP address), but just use a domain name and still access Google.

The DNS system is compared to a telephone book that assigns names and numbers. DNS servers are used to translate user requests or better known as name queries into IP addresses so that access to websites is well managed.

What is a DNS leak?

Every time you access a web page, you type the website address into the address bar of your web browser. Your Internet Service Provider (ISP) receives it as a DNS query on its server and sends you the instructions you need, even if you’re connected via VPN. Remember that all ISPs maintain a database of DNS names with their IP addresses.

A VPN leak occurs when your device sends its DNS traffic outside the VPN tunnel. This means that information about your browsing activity is not encrypted. It’s like not using any VPN.

Another case is when your device sends traffic to a third-party DNS server, making it easier for other parties to pry into your activities.

What causes a DNS leak?

There are many reasons why a DNS leak can occur. For example, your VPN may be configured incorrectly, so all traffic is mapped to your ISP’s DNS server before you log into the VPN.

Some VPN services (especially free VPNs) do not have their own DNS servers, resulting in constant DNS leaks, or do not have Internet Protocol version 6 or IPv6 support, which will likely take your DNS requests out of the VPN tunnel.

Even worse is when your device has been hacked and your DNS traffic is redirected outside of your VPN tunnel.

Therefore, a good rule of thumb is to avoid using your ISP’s default DNS server by using a reliable VPN and refrain from accessing suspicious websites that could trick you into participating in a hacker’s schemes.

How can I check if I have a DNS leak?

You can always perform a DNS leak test using online tools like ExpressVPN. Leak test.

When you visit the link, it will automatically detect whether your ISP can track your browsing activity, every app you use, and other information you submit online. Additionally, it will identify who runs their DNS servers on each website you access.

When you connect to ExpressVPN, the page will confirm that there is no possible DNS leak.

What can I do to prevent a DNS leak?

There are many ways to prevent a DNS leak.

1. Use a reliable VPN service with DNS leak prevention feature.

Not all VPN services are the same. For example, ExpressVPN guarantees its subscribers that all traffic between the device used and the DNS servers is encrypted. Every time you access a website, ExpressVPN ensures that no data traffic escapes the security tunnel when returning any web page to you.

And if you still detect a DNS leak (although this rarely happens), ExpressVPN’s customer support team will be ready to help you fix the problem 24/7.

2. Use an anonymous web browser.

You can use Tor, Epic, or SRWare Iron, which rely on an anonymous computer network to get online. This means you can hide your web activities and avoid third-party surveillance.

Remember that setting your browser to incognito mode will not prevent your ISP from tracking your activity. This will only hide your browsing history from other users on your device. So it’s still

3. Avoid using public Wi-Fi.

Whenever you are in a hotel or at the airport, the free Wi-Fi service can entice you to browse during your stay. However, most public Wi-Fi connections are encrypted and malicious hackers can take advantage of this to acquire all of your data traffic.

If you can’t avoid using public Wi-Fi, use a VPN to ensure all your activities are hidden and you remain anonymous.

4. Enable a firewall.

By disabling DNS, a firewall can prevent your information from leaving your device. If you want to limit your VPN coverage to only select sites, be sure to also block non-VPN data traffic using your firewall.

5. Configure your VPN to only use your VPN provider’s DNS servers.

Sometimes your ISP may force you to redirect your data traffic to its own servers without informing you. This means that you are forced to use the ISP’s server and initiate a DNS leak.

The best solution is to check your VPN settings and enable the option to force it to use the VPN provider’s DNS servers. This will prevent your ISP from intercepting your web traffic and redirecting it through a transparent proxy.

Frequent questions

How can I tell if there is a DNS leak on my connection?

Use a DNS leak testing tool, such as ExpressVPN’s free service. This will help you identify if there are any problems with your privacy.

How many times should I run a DNS leak test?

You should do this regularly, just like the way you check for viruses and errors on your device.

What should I do if there is a DNS leak?

If you are subscribed to a VPN service, please contact their customer support immediately before continuing to access the websites.

Can a VPN guarantee full protection against DNS leaks?

Yes, but only if you are using a trusted VPN service like ExpressVPN. Not all VPN services provide DNS leak protection, so you should check this feature first before subscribing.

What is a VPN that can prevent DNS leaks?

ExpressVPN is a consistent leader when it comes to security compared to other VPNs. It is based in the British Virgin Islands, where it is illegal to conduct any form of data retention. Therefore, ExpressVPN guarantees its customers that the company does not keep logs of user activities or connections in any way. Many analysts and product reviewers also agree that ExpressVPN is unparalleled when it comes to its strong privacy and security measures, a global server footprint, and excellent split-tunneling capability.

Ready to use a paid VPN? Try ExpressVPN!

If you want a VPN that offers strong security and geo-spoofing features you can trust, start making every browsing experience safe by choosing your ExpressVPN plan today. Enjoy the Internet with privacy and security!