VPN Leak

VPN Leak Test

Sometimes, a VPN may fail to protect DNS queries on your device even though the VPN tunnel covers the rest. This is known to be a “DNS leak”. Unauthorized entities (e.g. your internet service provider or DNS Server operator) may be able to see which websites you visit, and what apps you use.

DNS plays an important role as the internet’s address book. This means that DNS has an impact on almost everything you do online. Your browser and all other apps use DNS to locate the servers responsible for the websites and services you rely upon. Your device queries a DNS server and the server replies with directions to where you are looking. DNS is a major privacy risk.

DNS leaks are possible for many reasons. Here are some examples:

You have to manually configure your VPN: DNS leaks are higher if you manually configure VPN connections. Your operating system configuration will determine the exact risk. ExpressVPN apps eliminates many of these risks.

An attacker controls the router: A malicious Wi-Fi operator at coffee shops. An attacker could be able to track your device and force you to send DNS traffic outside of your VPN tunnel. ExpressVPN apps can provide DNS leak protection. But, there are other apps and manual configurations that could be vulnerable.

Manual DNS Setup: VPN DNS servers cannot be used by the operating system unless you or your software have specifically instructed it. Some people might need a particular DNS service to be able to access their data, but this is probably not the case for everyone.