Introduction: The Wrong Phone Book
When you type `google.com`, your computer looks it up in a 'Phone Book' called a **DNS Server**. If your VPN is hiding your identity, but your computer is still using your local ISP's phone book, your ISP knows exactly where you are and what you're doing. This is a DNS Leak.
How to Test
Visit our DNS Leak Test page. If you see any DNS servers belonging to your local ISP (like Comcast or AT&T) while your VPN is on, you have a leak. Your traffic is 'leaking' out of your secure tunnel.
Conclusion
A secure IP is useless without a secure DNS. Ensure your VPN is set to 'Always use VPN DNS' to stay truly private. Run a DNS leak test here.