DNS Leaks: What They Are and How to Check
A DNS leak occurs when name-lookup requests use an unintended resolver, potentially revealing browsing destinations outside the expected path.
Who this guide is for
VPN users troubleshooting privacy settings or unexpected network behavior.
Practical checklist
- Learn whether the browser uses system DNS, encrypted DNS, or its own configured resolver.
- Connect to the intended VPN server before checking the displayed resolver and network address.
- Repeat tests after sleep, reconnects, network changes, and enabling or disabling secure DNS.
- Review split-tunnelling, IPv6, and local-network settings that may intentionally change routing.
- Use the VPN provider’s support documentation when results conflict with the promised configuration.
Common mistake to avoid
Running one web test and treating its result as a permanent guarantee of anonymity.
A safer way to proceed
Test under realistic conditions and understand which resolver your operating system and browser are designed to use.
Product features, prices, eligibility, and policies can change. Confirm important details on the provider’s official website before purchasing, renewing, changing account settings, or acting on a security alert. If an incident may involve financial loss, sensitive personal data, or a business network, consider qualified professional help and the appropriate official reporting channel.