DNS Leak Test
Check if your DNS requests are leaking outside your VPN or proxy connection. Protect your privacy by ensuring your DNS queries are secure.
What is a DNS Leak?
A DNS (Domain Name System) leak occurs when your DNS requests bypass your VPN or proxy connection and go directly to your ISP's DNS servers. This exposes your browsing activity even when you think you're protected.
Why DNS leaks matter:
- Your ISP can see every website you visit
- Third parties can track your browsing history
- Defeats the purpose of using a VPN or proxy
- Can reveal your actual location
- Compromises your online privacy
How DNS Leaks Happen
DNS leaks can occur due to various reasons:
- IPv6 leaks: Your device uses IPv6 DNS instead of IPv4
- DHCP configuration: Your OS ignores VPN DNS settings
- Split tunneling: Some traffic bypasses the VPN
- WebRTC leaks: Browser exposes real DNS servers
- Poor VPN/proxy config: DNS not properly routed
How to Fix DNS Leaks
Quick fixes:
- Use a VPN with built-in DNS leak protection
- Configure custom DNS servers (1.1.1.1, 8.8.8.8)
- Disable IPv6 on your device
- Use encrypted DNS (DNS over HTTPS)
- Block WebRTC in your browser
Best solution: Use a proxy or VPN that routes all DNS traffic through encrypted tunnels, like Coronium's mobile proxies.
DNS Leak vs WebRTC Leak
DNS Leak: Your DNS requests are visible to your ISP
WebRTC Leak: Your real IP address is exposed through browser WebRTC
Both can compromise privacy, but they leak different information:
- DNS leak: Reveals browsing history
- WebRTC leak: Reveals IP address and location
Test for both: Use our WebRTC Leak Test to check for WebRTC leaks.
Frequently Asked Questions
How accurate is this DNS leak test?
Our test detects DNS servers your device is currently using and checks if they match your VPN/proxy provider. While comprehensive, some advanced leaks may require additional testing tools.
Can I have DNS leaks even with a VPN?
Yes. Many VPN services have DNS leak issues due to poor configuration, IPv6 leaks, or OS-level DNS settings that override the VPN. Always test your VPN for DNS leaks.
Do mobile proxies prevent DNS leaks?
High-quality mobile proxies like Coronium route all DNS traffic through the proxy connection, preventing leaks. However, browser-level leaks (WebRTC) may still occur without proper configuration.
Should I use my ISP's DNS servers?
No. ISP DNS servers can track your browsing history and may be slower. Use privacy-focused DNS like Cloudflare (1.1.1.1) or Google (8.8.8.8), or better yet, use a VPN/proxy with built-in DNS.
What is DNS over HTTPS (DoH)?
DoH encrypts your DNS requests using HTTPS, preventing ISPs and network operators from seeing or tampering with your DNS queries. Modern browsers support DoH and it's recommended for privacy.
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Coming Soon: WebRTC Leak Test, IP Blacklist Check, Browser Fingerprint Test