IPv6 Leak Test

Free IPv6 leak test for VPN users. Many VPNs tunnel IPv4 only — dual-stack networks can still reveal your identity over IPv6.

Detect WebRTC IP leaks that can reveal your real IP address even when using VPN

Run a test to view results here.

Identify the DNS resolver answering your queries (EDNS), not your VPN egress IP

Run a test to view results here.

Check if IPv6 traffic is leaking outside of your VPN tunnel

Run a test to view results here.

Run at least one test to share a report.

Guide & FAQ

When IPv6 is on at the router but the VPN has no IPv6 address, browsers may prefer IPv6 for dual-stack sites and bypass the encrypted tunnel.

Disable IPv6 on the OS/router, or use a VPN that supports IPv6 and blocks native IPv6 when disconnected.

Should I disable IPv6 for VPN privacy?

If your VPN lacks IPv6 support, disabling IPv6 prevents accidental bypass leaks.

How common are IPv6 leaks?

Common on home networks with ISP IPv6 and VPN clients that only handle IPv4.