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VPN Kill Switch

Network Privacy

Network policy that blocks non-tunneled traffic.

Definition

A kill switch enforces firewall/routing rules to prevent traffic from bypassing the VPN interface, maintaining policy even during reconnection or failure.

In plain English Network policy that blocks non-tunneled traffic.

Why this matters

Why it matters: It reduces leakage of source IP and DNS when tunnel state changes.

Example

Example: OS firewall rule set that only allows outbound traffic via the VPN interface.