DNS Leak
Color key Green — healthy / above target Blue — normal / neutral info Amber — below target, worth a look Red — leak or serious problem Grey — not run yet
Who resolves your website lookups?
DNS resolver ASN vs. declared VPN ASN — mismatch = leak.
Fix thisWhat is this?
Every time you type a domain name like example.com, your device has to ask a DNS resolver to translate that into an IP address. This test compares two answers: (1) the IP + country we see for the request that hit our server, and (2) the Cloudflare edge that answered a DNS-style trace from your browser. If those two look like they belong to very different networks or countries, your DNS is being handled by a resolver that is not on the path you probably think it is -- classic symptom of a VPN or DNS-over-HTTPS setup that is only partially covering your traffic.
So what?
A DNS leak is a privacy problem because your resolver sees the name of every site you visit before any HTTPS encryption kicks in. If you are paying for a VPN specifically for privacy, and your DNS queries are still going to your ISP or to Google, then your ISP still has a full log of the domains you browse -- the VPN is only hiding the content, not the destinations. It also breaks censorship-resistance: a hostile network can silently redirect DNS answers even when the rest of your traffic looks encrypted.
Now what?
Good news: your DNS resolver country matches your public IP country, which is what we would expect for a normal, unproxied home connection. Nothing to do right now. If you later start using a VPN, come back and re-run this test -- if the numbers stop matching, that means the VPN is protecting your web traffic but leaking your DNS lookups, which is worth fixing in the VPN client settings.
This card flagged a mismatch. To fix: (1) In your VPN client, look for a setting called "Use VPN DNS" or "Block IPv6 / DNS outside tunnel" and turn it on. (2) In your browser, enable Secure DNS (DoH) pointed at a resolver you trust -- Cloudflare 1.1.1.1, Quad9 9.9.9.9, or your VPN provider's resolver. (3) Re-run this test to confirm the fix. (4) If you are on a corporate or campus network you cannot control, assume DNS is being logged and use Tor Browser for anything sensitive rather than fighting the network.
If this card flags a mismatch: adjust your VPN client to force DNS through the tunnel, enable Secure DNS in your browser, and re-run this test.