Incorrect network configurations or faulty VPN/proxy software can lead to your device sending DNS requests directly to your ISP‘s server, potentially enabling ISPs or other third parties to monitor your online activity.

The DNS Leak Test is a tool used to determine which DNS servers your browser is using to resolve domain names. This test attempts to resolve 50 randomly generated domain names, of which 25 are IPv4-only and 25 are IPv6-only.