What a kill switch does and why it matters

How it protects you

• When the VPN tunnel is active, your traffic is routed through TunnelBear’s encrypted servers.
• If the tunnel drops, a kill switch stops all traffic from leaving your device through non-TunnelBear networks.
• This prevents accidental exposure of your true IP address, location, and ISP.

Common scenarios where it helps

• Wi‑Fi drops on public networks.
• TunnelBear server maintenance or congestion causing a brief disconnect.
• Power saver or firewall rules temporarily blocking VPN traffic.

Practical impact

• Privacy-minded users get continuous protection, even during hiccups.
• Individuals in restrictive regions or on sensitive networks benefit from reduced leak risk.

Availability by platform and version

Windows and macOS

• TunnelBear has historically offered a system-wide kill switch on desktop clients, but features can vary by version.
• Ensure you’re using a recent version of the TunnelBear app and check the settings for a feature labeled “Kill Switch,” “Always-on VPN,” or similar.

IOS and Android

• Mobile platforms may present the kill switch as part of the app’s protection layer, or rely on the OS-level VPN configuration.
• On Android, the feature is often tied to how the app integrates with Android’s VpnService. On iOS, it may be more tightly controlled by the app’s internal VPN routing.

Web browser and browser extension

• TunnelBear’s browser extensions do not typically provide a full system kill switch. They secure traffic inside the browser when the VPN is connected but may not shield all apps.
• For complete protection, use the desktop or mobile app with a proper kill switch.

How to verify availability

• Open the TunnelBear app’s settings or preferences.
• Look for terms like Kill Switch, Network Lock, Always-on VPN, or similar.
• If you can’t find it, consult the help center or update to the latest version.

How to enable and configure the kill switch

Step-by-step guide (general)

1. Open the TunnelBear app.
2. Go to Settings or Preferences.
3. Locate the Kill Switch option. It might be under a Security, Privacy, or VPN section.
4. Toggle it on. Some platforms may offer options like “Kill on Disconnect” or “Kill on VPN drop.”
5. If prompted, grant necessary system permissions to enforce the rule.

Testing after enabling

• Connect to a TunnelBear server.
• Disable the VPN connection from within the app or by simulating a drop (e.g., turn off Wi‑Fi then re-enable).
• Check your real IP address using an external service (e.g., whatismyipaddress.com) to ensure it does not reveal your location when the VPN disconnects.

Tips for reliable protection

• Always test after major app updates. Settings can reset or change.
• If you use other VPN or network tools, ensure they don’t override TunnelBear’s kill switch.
• Pair the kill switch with “Always-on VPN” if your OS supports it for stronger enforcement.

Testing and troubleshooting the kill switch

How to test effectively

• Do a controlled disconnect: while connected to TunnelBear, disconnect the VPN from the app or disable network access to the VPN interface.
• Observe whether real IP or DNS leaks occur by checking an IP leak test site.
• Repeat on different networks (home, public Wi‑Fi, mobile data) to verify consistent behavior.

Common issues and fixes

• Issue: Kill switch doesn’t engage on disconnect.
• Fix: Update to the latest TunnelBear version. Re-enable the feature. Reinstall if needed.
• Issue: DNS leaks occur during an abrupt disconnect.
• Fix: Ensure DNS leak protection is enabled separately if available. Verify via DNS leak testing sites.
• Issue: Slow connections after enabling kill switch.
• Fix: Check for app conflicts, firewall rules, or antivirus software interfering with VPN routing.

Comparisons and options

How a kill switch complements other protections

• VPN encryption plus kill switch provides defense in depth.
• Combine with DNS leak protection where available to reduce exposure.
• Use strong device security practices: device passcodes, biometric locks, and screen-time restrictions.
• Maintain an updated privacy posture: review app permissions, disable unnecessary plugins, and monitor for data leaks.

Limitations and caveats

• Not a foolproof shield: a kill switch protects against IP leaks due to VPN drops but cannot protect against malware-level exfiltration or apps directly routing traffic outside the VPN.
• Platform-dependent behavior: some OS versions enforce the kill switch more aggressively than others. Always verify on your own device.
• Network anomalies: in extremely aggressive network failures or misconfigurations, some traffic could still leak until the feature fully enforces.

Best practices for using TunnelBear with a kill switch

• Keep the app updated: new builds address leaks, bugs, and performance issues.
• Enable the kill switch by default after installation. Test post-setup.
• Regularly run leak tests on multiple networks to confirm effectiveness.
• Pair with a strong password and two-factor authentication for your TunnelBear account.
• If you rely on a corporate or school network, verify that TunnelBear’s settings aren’t overridden by policy-enforced configurations.

Final recommendation

If your priority is minimizing IP and DNS exposure, enable TunnelBear’s kill switch wherever you can on your device and test it periodically. It provides an essential safety net for sudden VPN drops, especially on public Wi‑Fi or unstable connections. However, don’t rely on it alone, keep your app updated, run leak tests, and follow best privacy practices to maintain robust protection across your devices and networks. If you’re unsure about your platform’s support or how to enable the feature, consult TunnelBear’s help center or contact support for the latest instructions tailored to your device and app version.