Of course, you should always make sure you’re using your VPN provider’s DNS servers when connected. If you’re not, you’re leaking DNS. That means your DNS requests aren’t going through the VPN tunnel and are likely being sent to your ISP’s DNS servers. And because your DNS queries are tied to your location and the websites you visit, your ISP gets some visibility into your online activities – essentially negating the VPN’s privacy benefits.
Performing a DNS leak test is very simple and will allow you to confirm that your DNS requests are secured. To do that, follow the instructions below:
Go to Comparitech’s DNS leak test page.
Make sure you’re NOT connected to your VPN.
Click Test. You should see your ISP’s DNS servers listed.
Connect your VPN.
Click DNS Test with VPN. You should now see your VPN provider’s DNS servers. If you see any other DNS servers than your VPN provider, you’re leaking DNS.