The domain name server (DNS) is responsible for resolving domain names such as into actual IP addresses to connect to. When using a secured connection like a VPN tunnel, a DNS leak occurs when DNS requests are sent through the normal (unencrypted) network instead of the secure tunnel.

But that’s not always the case. A DNS leak is a security flaw that allows your queries to travel to the default DNS servers, which belong to your internet service provider (ISP). That may happen if you: are running Windows 8 or later with the “Smart Multi-Homed Name Resolution” feature enabled; In this context, with "DNS leak" we mean an unencrypted DNS query sent by your system OUTSIDE the established VPN tunnel. Why my system suffers DNS leaks? In brief: Windows lacks the concept of global DNS. Each network interface can have its own DNS. If you are connected to a VPN and see your Internet Providers IP addresses here this means that your VPN is leaking DNS requests and is exposing what web sites/services you're using to your Internet Provider. IP Reload Test How to test for DNS leaks The easiest way to test for a DNS leak is to go to and run a free test. It will tell you your device’s IP address and your rough location. You should run two tests, one before you activate your VPN service and one after, to ensure that your online privacy is protected.

Dec 16, 2016 · How to fix DNS Leaks The easiest/best way to fix DNS leaks is to choose a VPN provider that has built-in DNS leak protection . These providers use their own custom (and private) DNS servers, and use special technology to ensure that your DNS requests are always routed securely, inside the encrypted VPN tunnel.

DNS Leak with VPN (WireGuard) and Pihole (DoH) I have a setup with a Pihole acting as DNS server on my local network. It uses DNS over HTTPs (DoH) to Cloudflare ( ). Oct 06, 2019 · A DNS leak exposes your IP address and your browsing activity to your ISP, and means they can share your records with anyone from marketers to government agencies who request them. More importantly, if you value your privacy, an ISP knowing where on the web you visit is a major issue.

VPN DNS Leak Protection is one of the many essential security features a VPN must have. We should note that all VPN clients tested in our Best VPN Service article provide DNS Leak Protection and passed all DNS Leak tests. VPN DNS Leak Protection. Thankfully, if you do find a leak it's not the end of the world. offers a simple test to determine if you DNS requests are being leaked which may represent a critical privacy threat. The test takes only a few seconds and we show you how you can simply fix the problem. DNS Leak Test You are connecting from an IPv4 address: We will check if your dns queries come from this same ip. A DNS leak refers to a security flaw that allows DNS requests to be revealed to ISP DNS servers, despite the use of a VPN service to attempt to conceal them. Although primarily of concern to VPN users, it is also possible to prevent it for proxy and direct internet users.