LEAKS AND TESTING
VPN leak tests and how to read them
A VPN that shows connected can still leak. These articles cover the four leaks worth testing for, how to run each test, and how to read a result that looks alarming but is not. Every one of them pairs with a free tool on this site.
10 articles
Browser fingerprinting: the thing a VPN cannot hideYour browser leaks dozens of properties that combine into a near-unique identifier. Changing your IP does not touch any of them, and can add a signal.
mDNS candidates and local IP exposureSeeing .local addresses in a WebRTC test means the browser's protection is working. What the old local-IP leak was and why it mostly closed.
How accurate is IP geolocation?Country is usually right, city is often wrong, and mobile is worse. Why the databases behave this way and what accuracy to expect.
What your IP address actually revealsAn IP address gives away your provider, your rough location and a way to link sessions. It does not give away your name, and it is not nothing.
Testing VPN speed fairlyMost VPN speed comparisons measure the wrong thing. How to run a test that isolates the tunnel from distance, congestion and your own Wi-Fi.
How to confirm your real VPN exit countryGeolocation databases disagree and servers are not always where they claim. Three ways to check a VPN exit country, including one that cannot be faked.
IP leak, DNS leak, WebRTC leak: which is whichFour different failures get called a leak. What each one exposes, to whom, and which of them actually matters for what you are worried about.
WebRTC leaks, browser by browserWebRTC reports your addresses to any page that asks, with no prompt. What each browser does about it and what you can actually change.
How to read a DNS leak test resultA leak test result is a list of resolvers. Knowing which findings are leaks, which are normal, and which are your browser going its own way.
Seven checks that prove your VPN is workingA connected icon proves nothing. Seven checks that confirm the tunnel carries traffic, resolves names correctly and fails closed when it drops.
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