DNS Leak Test – Check for Proxy and VPN DNS Leaks

A DNS leak can silently expose your true identity and browsing activity—even if you’re using a VPN or proxy. Use our DNS leak test tool below to instantly check if your DNS requests are really private, and learn how to fix leaks for total online peace of mind.

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A modern stock photo showing the concept of DNS privacy, with a computer and server racks or a network diagram

What is a DNS Leak?

Whenever you visit a website, your device asks a DNS server to translate the website name (like example.com) into an IP address. If you use a VPN or proxy, you expect all your online requests—including DNS lookups—to go through that secure tunnel. But a DNS leak happens when your device accidentally uses your real ISP’s DNS server instead, revealing your true location and activity to third parties.

  • DNS leaks expose: Your real IP address, location, and browsing habits—even if you’re using a VPN or proxy.
  • Why it matters: It’s like locking your front door, but leaving the window wide open!
DNS Leak Analogy
Imagine sending all your mail using a PO Box (VPN), but your return address is still your real home—anyone can track you! A DNS leak is your digital return address showing up in the open.

Risks and Implications of DNS Leaks

  • Loss of Anonymity: Your real IP and location are visible to ISPs, sites, and trackers.
  • Geo-block Failure: Streaming or gaming sites see your real region, not your VPN/proxy.
  • Targeted Ads & Tracking: Ad networks and analytics can profile you based on DNS lookups.
  • Local Censorship: School, workplace, or governments can monitor or block sites, even with a VPN.
  • Corporate/School Monitoring: Admins may see what you’re doing online despite your VPN.
Pro Tip: Even “secure” VPNs and proxies can leak DNS if not configured right. Always test—don’t assume you’re protected!

How DNS Leak Tests Work

A DNS leak test checks which DNS servers your browser is using right now. If you’re behind a VPN or proxy, you should not see your home country or ISP. If you do, your DNS is leaking!

  • Expected: DNS server matches your VPN/proxy, or a public DNS (e.g., Cloudflare, Google).
  • Leaking: DNS server shows your real ISP/country/location.
What You Expect vs. What You See
Expected
VPN/Proxy DNS
Leaking
Real ISP DNS

DNS Leak Test Tool: Run Your Check Online

Click the button below to test your DNS. The test will display which DNS resolvers your browser is using—revealing any leaks, even behind a VPN or proxy.
Note: If you see your home country, real ISP, or local DNS here, you may have a DNS leak. If you use a VPN or proxy, the DNS should match your VPN or a public resolver (Cloudflare, Google, etc.).

How to Fix DNS Leaks (Step by Step)

Windows 10/11
  1. Open Settings → Network & Internet → Ethernet/Wi-Fi.
  2. Click your network, then DNS server assignment → Edit.
  3. Choose Manual, enable IPv4, and enter custom DNS (e.g., 1.1.1.1 or 8.8.8.8).
  4. Save and retest above.
Detailed Windows DNS Guide
MacOS Monterey/Sonoma
  1. Open System Settings → Network.
  2. Select your connection, click Details, then DNS.
  3. Add custom DNS servers (e.g., 1.1.1.1, 8.8.8.8).
  4. Click OK and Apply. Re-run the test above.
Full Mac DNS Guide
Android / iOS
  1. Go to Wi-Fi settings, select your network.
  2. On Android: Tap Advanced → IP settings: Static → set custom DNS.
  3. On iOS: Tap Configure DNS → Manual → enter DNS servers.
  4. Save and retest.
Mobile DNS Setup Guide
VPN/Proxy Settings
  1. Use VPNs that offer DNS leak protection or “force all traffic through VPN.”
  2. Disable IPv6 in your network settings (some leaks occur via IPv6).
  3. Check your VPN/proxy app’s advanced settings for DNS options.
  4. Always re-run the DNS leak test after changing settings.
VPN vs Proxy for Privacy
Don’t forget: Some browsers (like Firefox) can override system DNS. Always test after making changes!

DNS Leak Test FAQ & Resources

Yes—if your VPN doesn’t properly route DNS traffic or your system/browser is configured to use your ISP’s DNS. Always use VPNs with DNS leak protection and check with our test tool.

Not always. Many proxies only forward web traffic, not DNS. For complete DNS privacy, combine proxies with secure DNS config or use a VPN with leak protection. See Proxy Security Tips.

Use the DNS leak test tool above! Click Run Test and review the detected DNS servers. If your real ISP/country appears, your DNS is leaking. Re-run the test after any changes.

Check whenever you change your VPN/proxy, update your system, or connect to a new network. It’s good practice to test regularly, especially if privacy is crucial.

Some browser extensions can override DNS settings and leak info. Tor generally prevents DNS leaks by routing everything through the Tor network, but misconfiguration or additional extensions can cause leaks. Always test after making changes.

Explore Proxy Security Tips, Proxy vs VPN, and Proxy Checker Tool for more in-depth guides and tools.
More Tools & Guides
Quick Links
Want to go further? Check your proxy for leaks or see all our security tips.
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