U
UtilyxHub
DNS Auditor ← All Tools
🔒 100% In-RAM DNS Audit • Zero Telemetry Logging • DoH Protocol Testing

DNS Leak Test

Verify if your VPN or proxy is leaking domain name requests to your ISP. Benchmark DNS-over-HTTPS (DoH) response latency and audit resolver privacy.

DoH Protocol Engine Ready
DNS Privacy & Encryption Rating
Encrypted DNS Verified
Encrypted (DoH Active)

Your browser successfully establishes encrypted DNS-over-HTTPS (DoH) sessions. Unencrypted plaintext DNS queries are not exposed to local ISP middleboxes.

DoH Encryption Active (TLS 1.3)
Primary Resolver Cloudflare (1.1.1.1)
Average Latency 28 ms
ISP Interception None (Protected)
Encrypted DNS (DoH) Resolver Benchmark 3 Resolvers Tested

Encrypted DNS routes queries over port 443 via HTTPS, rendering domain requests invisible to ISPs, network firewalls, and public Wi-Fi sniffers.

How to Fix DNS Leaks Hardening Guide
1. Enable Secure DNS in Chrome / Brave:

Settings $\rightarrow$ Privacy and security $\rightarrow$ Security $\rightarrow$ Use secure DNS $\rightarrow$ Select Cloudflare (1.1.1.1) or Quad9.

2. Enable Max Protection in Firefox:

Settings $\rightarrow$ Privacy & Security $\rightarrow$ DNS over HTTPS $\rightarrow$ Select Max Protection.

3. VPN Client Kill Switch:

Ensure your VPN application has DNS Leak Protection and an active Network Kill Switch enabled.

Cross-Link Audit

Also test WebRTC STUN leaks using our WebRTC Leak Test.

DNS Protocols Compared: Plaintext DNS vs DoH vs DoT

Why traditional unencrypted DNS (Port 53) exposes your entire browsing history.

Protocol Standard Transport Port Encryption & Integrity ISP Visibility
Standard Plaintext DNS UDP/TCP Port 53 None (Plaintext clear text) Full Visibility (Logged & Sellable)
DNS-over-HTTPS (DoH) HTTPS Port 443 Encrypted via TLS 1.3 Zero Visibility (Looks like regular web traffic)
DNS-over-TLS (DoT) TLS Port 853 Encrypted via Dedicated TLS Protected (Port 853 can be filtered by firewalls)

How DNS Leaks Eviscerate VPN Anonymity

The Domain Name System (DNS) is the telephone directory of the internet, translating human-readable hostnames (such as utilyxhub.com) into machine-routable IP addresses. By default, internet connections route DNS queries to local ISP resolvers in **unencrypted plaintext on UDP Port 53**.

1. The Mechanics of a VPN DNS Leak

When you connect to a Virtual Private Network (VPN), all network traffic is intended to pass through the encrypted tunnel. However, if your operating system network stack retains default network adapters or fails to override DHCP DNS configurations, DNS requests bypass the tunnel and hit your ISP's recursive resolvers.

2. Neutralizing Leaks with DNS-over-HTTPS

Enabling **DNS-over-HTTPS (DoH)** forces the browser to wrap domain lookup queries in standard TLS 1.3 HTTP/2 or HTTP/3 frames routed over port 443. To any eavesdropper or ISP, your DNS queries are indistinguishable from normal secure web traffic.

🛡️ WebRTC Leak Test

Verify STUN candidate and public IP leaks with WebRTC Leak Test.

🔒 Browser Privacy Scanner

Audit GPU canvas and audio fingerprint entropy via Privacy Exposure Scanner.

Frequently Asked Questions

Does this test store or log the domains I resolve?

Never. All DoH probes and latency benchmarks execute 100% locally in your device's browser memory (RAM). Zero query data is transmitted to UtilyxHub servers.

Which encrypted DNS provider is most privacy-friendly?

Quad9 (9.9.9.9) and Cloudflare Privacy (1.1.1.1) provide strict zero-logging policies, DNSSEC validation, and malware domain blocking without commercial telemetry monetization.

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