Is Your VPN Actually Working?

Run a complete leak test to check if your IP address, DNS queries, or WebRTC connections are exposing your real identity.

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IP Address Leak Test
Checks if your real IP is visible
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DNS Leak Test
Checks if DNS queries leak outside your VPN
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WebRTC Leak Test
Checks if WebRTC reveals your real IP
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IPv6 Leak Test
Checks if IPv6 traffic bypasses your VPN
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Fix Leaks with Swiss Privacy

SwissGuard VPN has built-in DNS leak protection, WebRTC blocking, and IPv6 leak prevention. Zero logs. Swiss jurisdiction.

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✓ DNS leak protection ✓ WebRTC blocking ✓ Kill switch ✓ Swiss no-log policy

Understanding VPN Leaks

A VPN is supposed to create a secure, encrypted tunnel for all your internet traffic. But sometimes, data can escape this tunnel through leaks — exposing your real IP address, DNS queries, or location to websites, your ISP, or surveillance systems.

What Is an IP Leak?

An IP leak occurs when your real IP address is visible to websites despite being connected to a VPN. This can happen due to misconfigured VPN software, dropped connections without a kill switch, or protocols that bypass the VPN tunnel. Our test checks what IP address websites actually see when you connect.

What Is a DNS Leak?

When you visit a website, your device sends a DNS query to translate the domain name (like google.com) into an IP address. Normally, a VPN should route these queries through its own DNS servers. A DNS leak occurs when these queries go to your ISP's DNS servers instead, revealing which websites you visit.

DNS leaks are one of the most common VPN vulnerabilities. Even if your IP is hidden, a DNS leak lets your ISP see every website you visit. Our tool checks which DNS servers your queries are being sent to.

What Is a WebRTC Leak?

WebRTC (Web Real-Time Communication) is a browser technology used for video calls, voice chat, and peer-to-peer file sharing. It requires direct connections between devices, which can bypass your VPN tunnel and reveal your real IP address.

Most modern browsers have WebRTC enabled by default. Unless your VPN specifically blocks WebRTC requests, your real IP can be exposed through JavaScript running in your browser — even with a VPN active.

What Is an IPv6 Leak?

Many VPNs only tunnel IPv4 traffic. If your ISP supports IPv6 and your VPN doesn't handle it, IPv6 traffic can bypass the VPN entirely, exposing your real IPv6 address to websites that support it. A good VPN either tunnels IPv6 traffic or blocks it completely.

How SwissGuard VPN Prevents Leaks

SwissGuard VPN is designed to prevent all types of leaks:

Frequently Asked Questions

A DNS leak occurs when your DNS queries (website lookups) are sent to your ISP's servers instead of your VPN's servers. This means your ISP can see which websites you visit, even though your IP address is hidden by the VPN. It's one of the most common ways VPNs fail to protect privacy.
Run our leak test above. If all four tests pass (IP, DNS, WebRTC, IPv6), your VPN is working correctly. Your displayed IP should be the VPN server's IP, not your real one. DNS queries should go through the VPN's servers, not your ISP's.
WebRTC is a browser feature for video/audio calls that can bypass your VPN and reveal your real IP. To fix it: use a VPN with WebRTC leak protection (like SwissGuard), disable WebRTC in your browser settings, or install a WebRTC-blocking browser extension.
DNS leaks can happen for several reasons: your operating system may be configured to use your ISP's DNS servers directly, your VPN software may not properly override DNS settings, or your VPN may not have DNS leak protection built in. Windows is especially prone to DNS leaks due to its "Smart Multi-Homed Name Resolution" feature.
Free VPNs are significantly more likely to have DNS, WebRTC, and IP leaks. Many free VPNs lack proper leak protection, don't use modern protocols, and some even sell your browsing data to advertisers. A premium VPN like SwissGuard with built-in leak protection is the safest choice.
Test your VPN whenever you first set it up, after software updates, when connecting to a new network (like public WiFi), and periodically (once a month). VPN configurations can change with updates, and different networks may affect how your VPN routes traffic.

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