The Perfect Privacy DNS leak test shows which DNS server(s) you currently have in use for name resolution. Please use Perfect Privacy Check IP to see your externally visible IP address and your browser settings.
The domain name server (DNS) is responsible for resolving domain names such as perfect-privacy.com 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. This happens for instance when your operating system is using a name server provided by your router via the local network.
When you want to stay anonymous on the Internet it is imperative that all your traffic is routed through the secure tunnel such as OpenVPN, IPsec, SSH or TOR. This means that you should always make sure that your DNS queries are sent through a secure tunnel as well, because otherwise it is easily possible to find out to which servers you are connecting to.
While the actual traffic remains encrypted and cannot be sniffed, you are still giving away information that should remain private. After all it is nobody's business which websites you are visiting.
With Perfect Privacy you can make sure that you are always using a secure Perfect Privacy DNS server when using a secure tunnel. The Windows client has several options to ensure your DNS requests are not being sent over an unencrypted network.
You can choose to setup the DNS leak protection in three different levels: Active while a secure tunnel is established, active while the VPN software is running or always active.