VPN Leak Protection 2026 - DNS, IP & WebRTC
How every major VPN protects against DNS, IP, and WebRTC leaks. All six include leak protection by default. See the breakdown and learn how to test your own VPN for leaks.
What Is a VPN Leak?
A VPN leak is any traffic that slips outside the encrypted tunnel and travels over your regular connection instead - quietly exposing your real IP address, location, or the sites you're visiting. A leak defeats the entire purpose of a VPN, which is why leak protection is a non-negotiable feature.
Types of Leak
- DNS leak: your DNS lookups (the requests that turn a domain into an IP) go to your ISP instead of the VPN, revealing which sites you visit
- IP leak: your real IPv4 or IPv6 address is exposed, defeating the VPN entirely
- WebRTC leak: a browser feature exposes your real IP via direct network queries, even with the VPN connected
Leak Protection by Provider
Every provider we review ships the two features that prevent leaks - built-in DNS leak protection and a kill switch - enabled by default. Here's how each one stacks up:
| Provider | DNS Leak Protection | Kill Switch | DNS Leaks | IP Leaks | WebRTC Leaks |
|---|---|---|---|---|---|
| Mullvad | Yes Built-in | Yes | Protected | Protected | Protected |
| ProtonVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| NordVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| IVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| ExpressVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| Surfshark | Yes Built-in | Yes | Protected | Protected | Protected |
| CyberGhost | Yes Built-in | Yes | Protected | Protected | Protected |
| Private Internet Access | Yes Built-in | Yes | Protected | Protected | Protected |
| Windscribe | Yes Built-in | Yes | Protected | Protected | Protected |
| hide.me | Yes Built-in | Yes | Protected | Protected | Protected |
| VyprVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| PrivadoVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| Mozilla VPN | Yes Built-in | Yes | Protected | Protected | Protected |
| TunnelBear | Yes Built-in | Yes | Protected | Protected | Protected |
| PureVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| IPVanish | Yes Built-in | Yes | Protected | Protected | Protected |
| ZoogVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| FastestVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| StrongVPN | Yes Built-in | Yes | Protected | Protected | Protected |
| Hotspot Shield | Yes Built-in | Yes | Protected | Protected | Protected |
Every provider in our lineup ships DNS leak protection and a kill switch as standard, which is why all six rate strongly here. This is one area where the leading VPNs are uniformly solid - the differences show up elsewhere, in speed, streaming, and audit history.
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How We Assess Leak Protection
Our leak-protection rating weighs the features and behavior that actually stop leaks:
- Whether DNS leak protection is built in and on by default, not buried in settings
- Whether a kill switch is available to block traffic the instant the tunnel drops
- Whether the apps route DNS, IPv4, and IPv6 requests through the tunnel rather than your ISP
- Whether WebRTC leaks are handled by the app or browser extension
- Consistency across desktop and mobile, since leak behavior can differ by platform
Test Your Own VPN
Regardless of which VPN you use, verify it yourself in a few minutes:
- Note your real IP before connecting (search "what is my IP")
- Connect the VPN to a server in another country
- Run an IP and DNS leak test - you should see only the VPN's IP and DNS
- Check for WebRTC leaks in your browser; disable WebRTC or use the VPN's extension if needed
- Test the kill switch: with it on, disconnect the VPN manually and confirm your internet is blocked
If any test shows your real IP or ISP DNS, enable leak protection and the kill switch in settings, and switch to a WireGuard-based protocol. If leaks persist, that's a serious red flag - every VPN we recommend includes the protection to prevent these leaks out of the box.