A kill switch is a VPN safety feature that instantly cuts your internet connection if the VPN unexpectedly drops. This prevents your real IP address and unencrypted traffic from leaking during the seconds before the VPN reconnects — the exact moment your privacy is most at risk.
The problem a kill switch solves
VPN connections can drop briefly — when you switch networks, your Wi-Fi hiccups, or a server resets. Without a kill switch, your device silently falls back to your normal connection, exposing your real IP and activity until the VPN comes back. You often wouldn't even notice. A kill switch removes that risk by blocking all internet access the instant protection is lost.
How a kill switch works
The kill switch constantly monitors your VPN connection. If it detects a drop, it immediately blocks internet traffic on the device. Once the VPN re-establishes a secure tunnel, normal access resumes automatically. The result is a simple guarantee: your traffic only ever flows when it's encrypted.
Who benefits most from a kill switch
- Anyone on unstable Wi-Fi, where drops are common.
- People who need consistent privacy and can't risk even brief exposure.
- Travellers and mobile users who frequently switch between networks.
- P2P and large-transfer users who keep long-running connections active.
The kill switch in FortisVPN
FortisVPN includes an internet kill switch: if the VPN disconnects unexpectedly, it instantly cuts internet access to prevent data leaks, then restores it when the secure connection returns. Combined with FortisVPN's no-logs policy and strong encryption, it keeps protection airtight. Try FortisVPN free for 7 days.
Frequently asked questions
Q. Should I always keep the kill switch on? For consistent privacy, yes. It only acts when the VPN drops, so leaving it on costs nothing in normal use and protects you in the moment that matters.
Q. Will a kill switch disconnect my internet often? No. It only triggers when the VPN connection itself drops. On a stable connection you may never notice it.
Q. Is a kill switch the same as just turning the VPN off? No — it's the opposite. It stops your internet rather than letting it continue unprotected when the VPN fails.
Last updated: 14 June 2026
