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DNS leak test

A DNS leak test will show if your internet traffic is being routed through your chosen DNS.

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Secure your internet traffic and prevent DNS leaks with NordVPN.

What is a DNS leak?

A DNS leak is an online security flaw that can reveal your browsing activity by sending it to the wrong server. If you’re using a VPN or a proxy service, a DNS leak may show that your virtual private network isn’t working properly. However, DNS leaks can happen even if you’re not using a VPN. The DNS is heavily involved in your browsing activities, so finding and fixing DNS leaks immediately is key.

A thumbnail of a video that explains how to perform a DNS leak test.

Why does a DNS leak happen?

A DNS leak may happen for several reasons, such as:

What are the types of DNS leaks?

Standard DNS leak:

A device sends DNS queries to an unintended DNS server (e.g., an unsafe public server or an untrusted third-party DNS server).

IPv6 DNS leak:

A device uses the IPv6 protocol to send DNS queries. However, because not all VPN or proxy services support IPv6, these queries may be sent to an unintended DNS server.

WebRTC leak:

WebRTC is a communication protocol used for video and voice chats that may inadvertently reveal the user’s IP address or DNS requests.

Router DNS leak:

Misconfigured DNS settings on a router may lead to the device sending DNS queries to unintended DNS servers.

What are the dangers of a DNS leak?

A DNS leak is a significant security flaw that can expose your activity online. Here are some of the dangers of a DNS leak:

A person checking their smartphone for DNS leaks.

Why should you test for DNS leaks?

Checking for DNS leaks helps protect your privacy and ensure that your internet browsing activity is not exposed to unauthorized and potentially malicious parties. You should check for DNS leaks regularly to verify your DNS requests go where they should and that your online activity remains private.

A person uses NordVPN to prevent DNS leaks.
A fragment of an internet browser window that warns about a DNS leak.

How do you check if your DNS is leaking?

The easiest way to detect a DNS leak is by using a specially designed DNS leak test. NordVPN’s DNS leak test tool checks for DNS leaks and shows whether your internet traffic is routed through your chosen DNS or going elsewhere. It’ll also explain how to read the test results.

How to fix and prevent DNS leaks

How does NordVPN help protect you from a DNS leak?

A couple browsing online with NordVPN online protection.

Your ISP and various third-party companies know your virtual location, the websites you visit, and maybe even what you buy online. You can prevent them from tracking you by using NordVPN. This way, your online traffic, including DNS requests, passes through NordVPN’s encrypted servers, making the websites you visit or even your ISP can’t follow you around.

  • Thousands of VPN servers covering 202 locations ensure optimal speed.

  • NordVPN’s no-logs policy protects your privacy.

  • High-end encryption secures every bit of your online traffic.

Frequently asked questions