What is a VPN kill switch?

When your VPN connection drops, a kill switch blocks traffic so apps don’t leak to your ISP.

• Turn it on for laptops and desktops.
• On mobile, prefer “block outside VPN” if available.
• If a service doesn’t offer a kill switch, you can DIY with firewall rules.

Test it: start a download, toggle Wi‑Fi off, confirm traffic pauses until VPN reconnects.