VPNs are a powerful tool for online privacy, but not all of them offer the same level of protection. One of the most underrated yet essential features is the kill switch.
In this article, we’ll explain what a VPN kill switch is, how it works, when it activates, and why you should always have it turned on when using a VPN.
What is a kill switch?
A kill switch is a security feature built into many modern VPNs. Its purpose is to prevent your real IP address from leaking if the VPN connection unexpectedly drops.
Let’s say you’re using a VPN to hide your IP address while browsing or downloading. If your VPN disconnects even for a moment, your device will revert to your normal internet connection, revealing your true IP.
With the kill switch enabled, this won’t happen. The system blocks all internet traffic until the VPN is reconnected, acting like a digital circuit breaker that prevents accidental data exposure.
How does it work?
The kill switch constantly monitors the connection between your device and the VPN server. If a drop is detected, it can do the following:
- Block all internet traffic.
- Disable network adapters or modify firewall rules.
- Automatically close specific applications (such as browsers or torrent clients).
Once the VPN reconnects, your internet access resumes normally, ensuring you’re always protected.
Types of kill switches
| Type | Description | Common Use |
|---|---|---|
| System-level kill switch | Blocks all internet access when VPN fails. | Users who need full protection. |
| App-level kill switch | Blocks specific apps from accessing the internet. | Great for torrenting or secure browsing. |
Why you should enable it
Enabling the kill switch is crucial if you:
- Use public Wi-Fi (cafes, airports, libraries).
- Value your privacy or anonymity online.
- Access geo-restricted services.
- Handle sensitive or confidential data.
Without a kill switch, any VPN disconnection exposes your real location, identity, or even private data.
Real-life examples where it protects you
- Remote work: You're connected to your company servers through a VPN. If the VPN drops, your real IP could be exposed. The kill switch prevents this.
- Streaming from abroad: If the VPN disconnects mid-stream, the service detects your real location and might block or suspend your account. Not with a kill switch.
- Anonymous browsing: If your VPN fails while trying to hide your IP, your digital trail becomes visible.
Does your VPN have it?
Not all VPNs offer a kill switch, and those that do may use different names: “Network Lock,” “Internet Kill Switch,” “Always-On VPN,” and more.
Check your VPN’s settings to ensure it’s activated. If it's missing, consider switching providers. Many paid VPNs offer robust protection, and even some free ones include it.
Extra tips
- Check if your IP actually changed using this tool: know your IP.
- Look for DNS or WebRTC leaks.
- Follow good digital hygiene practices (no open Wi-Fi, strong passwords, antivirus software).
In this article we've learned that
- A VPN kill switch is essential for online privacy.
- It blocks internet traffic when your VPN fails to avoid IP leaks.
- There are system-level and app-specific kill switches.
- You should always enable it, especially when using public networks or handling sensitive data.
- It’s also useful to change your IP and verify your protection status.
Want to see your current IP address? Try our tool to check your public IP instantly and make sure your VPN is working.
