Verify if your system DNS queries route through secure tunnels or bypass configurations to expose browser history to your ISP.
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What is a DNS Leak & Why is it a Privacy Risk?
DNS (Domain Name System) is the protocol that translates website domains (like google.com) into numerical IP addresses. A DNS leak occurs when DNS requests bypass your active proxy connection and go directly to your local ISP's servers. Even if your proxy masks your IP address, your ISP can still monitor and log every website you visit.
How to Prevent DNS Leaking
To prevent leaks and maintain privacy, always configure your operating system or browser extension to route all DNS queries through your proxy tunnel. Enabling **DNS over HTTPS (DoH)** inside browser settings encrypts DNS traffic, ensuring queries are completely hidden from ISPs.
Frequently Asked Questions (FAQ)
DNS leaks are commonly caused by operating system defaults (like Windows Smart Multi-Homed Name Resolution), misconfigured browser routing rules, or VPN/proxy client dropouts that fail to override default network adapter interfaces.
Not necessarily. If your IP address shows a remote location but your DNS queries are resolving through your home ISP name servers, your browsing activity is still fully leaked to your ISP.
DoH is a security protocol that runs DNS resolutions over encrypted HTTPS connections (usually via port 443) rather than standard unencrypted UDP. This hides queries from network sniffers and ISP logging systems.
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