DNS Data Leak from Computer

DNS Leak – An Open Door

A DNS leak is an open door for someone to find your IP. You may be using a VPN service and see the original ip address replaced with your VPN provider’s IP address. However, a DNS leak can still expose your unmasked IP address. Let us explain how this works.

DNS Data Leak from Computer

When using VPN service, it is critical that all activity initiated from your PC is steered through the VPN provider. On the off chance that any movement spills outside of the protected association with the system, any foe checking your movement will have the capacity to log your action.

A DNS (domain name system) is used when accessing all websites to convert domain names (such as www.hellovpn.com) into numerical IP addresses (ex for computers to transfer data across the internet. Every time you access a website using your browser, a request is made to a DNS server to provide the domain name IP address. Most internet service providers have their own DNS servers which they control and utilize for logging and recording your internet browsing history.

A DNS leak occurs when the device you are using to access the internet continues to use its default DNS servers instead of the DNS servers assigned to your computer by the VPN service. This is a major issue as your anonymity may be compromised even when using the IP address of your VPN provider.

DNS Leak Diagram

(Image source: www.dnsleaktest.com)

Many VPN providers enable DNS leak protection by default. However, you must confirm this with your VPN provider. For example, Private Internet Access VPN service has a DNS Leak protection setting, but it is not enabled by default.

Private Internet Access DNS Leak Setting


DNS Leak Test Service

To validate a secure DNS server is being utilized, go to https://www.dnsleaktest.com/ and peform the extended test. Check the DNS server(s) reported and confirm they are not from your ISP. If a server is from your ISP, then you are experiencing a DNS leak.


DNS Leak Protection Test