DNS Privacy Diagnostic
A browser cannot enumerate system DNS resolvers or prove whether your operating system uses DoH. This diagnostic records public IP, organization, and DoH endpoint reachability only.
Starting this test contacts api.ipify.org (public IP), ipapi.co (org heuristic), and cloudflare-dns.com (DoH probe).
Ready to Test
This check cannot list your real DNS resolvers. It looks up a public IP, probes a DoH endpoint, and applies a VPN/hosting heuristic — only after you start the test.
What are DNS Leaks?
DNS leaks occur when your device sends DNS queries outside of your VPN tunnel, potentially exposing your browsing activity to your ISP or other third parties.
How DNS Works
- • Translates domain names to IP addresses
- • Required for every website visit
- • Usually handled by your ISP
- • Can reveal browsing patterns
Privacy Risks
- • ISP can see all websites visited
- • Bypasses VPN protection
- • Can be logged and monitored
- • May be shared with third parties
How to Prevent DNS Leaks
VPN DNS Settings
- • Use VPN's DNS servers
- • Enable DNS leak protection
- • Configure custom DNS in VPN
- • Test VPN DNS configuration
System DNS Settings
- • Set secure DNS servers (1.1.1.1, 9.9.9.9)
- • Enable DNS over HTTPS (DoH)
- • Use DNS over TLS (DoT)
- • Disable IPv6 if not supported
Advanced Protection
- • Use Tor Browser
- • Configure firewall rules
- • Use DNS filtering software
- • Monitor DNS queries
Secure DNS Providers
Cloudflare
1.1.1.1Fast, privacy-focused, no logging
Quad9
9.9.9.9Security-focused, blocks malware
AdGuard
94.140.14.14Blocks ads and trackers
OpenDNS
208.67.222.222Content filtering options
Related reading
Strengthen Your DNS Privacy
Learn how to configure secure DNS settings and protect your browsing activity from prying eyes.