Vpn leak test The DNS Leak Test is a tool used to determine which DNS servers your browser is using to resolve domain names. 3. First, run a DNS leak test, IP leak test, and WebRTC leak test without a VPN. Jun 23, 2023 · Learn how to test your VPN for IP, DNS, and WebRTC leaks with a simple tool. Close the page. Then, run Feb 6, 2022 · VPN Leak Test. A DNS leak test means checking whether your VPN or your ISP is directing your DNS requests. Turn off your VPN, run the speed test again, and note the difference. Step 3: Test for DNS Leaks. What causes VPN leakage of DNS? DNS leaks can happen for many reasons.