VPN Kill Switch Explained
A kill switch is your last line of defense. It blocks all internet traffic if your VPN connection drops, ensuring your real IP is never exposed.
In this guide
How a Kill Switch Works
A VPN kill switch monitors your connection to the VPN server. If the connection drops for any reason — network change, server issue, or software crash — the kill switch immediately blocks all internet traffic on your device. This prevents any data from leaking outside the encrypted tunnel.
Why You Need a Kill Switch
Without a kill switch, a brief VPN disconnection can expose your real IP address, DNS queries, and browsing activity. This is especially dangerous on public Wi-Fi, when torrenting, or when accessing sensitive content.
CasperVPN Kill Switch
CasperVPN offers an always-on kill switch on all platforms. On iOS and Android, it integrates with the system VPN framework for reliable protection. On desktop, it uses firewall rules to block traffic at the OS level.
Frequently Asked Questions
Should I always keep the kill switch on?
Yes, for maximum security. The only downside is losing internet access during brief VPN reconnections. If you prefer uninterrupted access, you can disable it, but we recommend keeping it enabled.