killswitch ☆
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Description:
VPN kill switch for macOS
Type: Formula  |  Tracked Since: Dec 28, 2025
Links: Homepage  |  formulae.brew.sh
Category: Security
Tags: vpn security privacy networking macos kill-switch
Install: brew install killswitch
About:
Killswitch is a command-line utility that implements a robust fail-safe mechanism for VPN connections on macOS. It monitors your active VPN interface and instantly blocks all internet traffic if the VPN disconnects unexpectedly. This ensures your real IP address and sensitive data are never exposed, providing critical privacy protection for users who require constant secure connections.
Key Features:
  • Monitors VPN connection status in real-time
  • Instantly blocks all non-VPN traffic on disconnect
  • Lightweight command-line interface
  • Automatic startup and background operation
  • Supports multiple VPN providers
Use Cases:
  • Securing torrenting or P2P file sharing activities
  • Protecting sensitive work communications on public Wi-Fi
  • Ensuring privacy during anonymous browsing sessions
  • Preventing IP leaks during critical operations
Alternatives:
  • Viscosity – Full-featured VPN client with built-in kill switch, but requires purchase and is more complex
  • Little Snitch – Comprehensive firewall that can block traffic, but not VPN-specific and requires configuration
Version History
Detected Version Rev Change Commit
Sep 12, 2025 8:59am 0 VERSION_BUMP 5fe3430e
Sep 14, 2024 11:44am 0 VERSION_BUMP dbc4c7b4
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