Using the Kill Switch

The kill switch is one of the most important security features in EdgeVPN. This guide explains what it does, why you need it, and how to configure it properly on all your devices.

What is a Kill Switch?

A VPN kill switch is a safety mechanism that blocks all internet traffic if your VPN connection drops unexpectedly. Think of it as a failsafe that ensures your real IP address and online activity are never exposed, even for a moment.

Without a kill switch, if your VPN disconnects due to network issues, server problems, or app crashes, your device will automatically reconnect to the internet directly,exposing your real IP address and unencrypted traffic.

How the Kill Switch Works

When you enable the kill switch in EdgeVPN:

1. VPN Connected: All internet traffic flows through the encrypted VPN tunnel as normal
2. Connection Drops: EdgeVPN detects the disconnection immediately
3. Internet Blocked: The kill switch activates and blocks all internet access
4. VPN Reconnects: EdgeVPN automatically attempts to reconnect
5. Internet Restored: Once the VPN connection is re-established, internet access resumes

This entire process happens in milliseconds, preventing any data leaks during the transition.

Why You Need a Kill Switch

The kill switch protects you in several critical scenarios:

Protection from IP Address Leaks

Your IP address reveals your physical location and can be used to identify you online. If your VPN drops without a kill switch, websites, advertisers, and potential adversaries can see your real IP address.

Example: You're torrenting a file with your VPN active. Your VPN connection drops for 30 seconds. Without a kill switch, your ISP and copyright holders can see your real IP address downloading copyrighted material.

With Kill Switch: Your internet is blocked during those 30 seconds, preventing any exposure.

Defense Against DNS Leaks

When your VPN disconnects, your device reverts to your ISP's DNS servers, which can see every website you visit.

Without Kill Switch: Your DNS queries leak to your ISP during disconnections With Kill Switch: No DNS queries are sent during disconnections

Unstable Network Protection

Mobile connections, public Wi-Fi, and unreliable home internet can cause frequent VPN disconnections. The kill switch ensures you're protected even on unstable networks.

Application-Level Protection

If specific apps reconnect faster than your VPN, they might send data unencrypted during that window. The kill switch prevents this by blocking all network access until the VPN is active.

When to Use the Kill Switch

Essential Scenarios (Always Enable)

Torrenting and P2P File Sharing

• Absolutely critical to prevent IP exposure to peers
• Many copyright holders monitor torrent swarms for real IP addresses
• Even momentary exposure can result in legal notices

High-Privacy Activities

• Whistleblowing or sensitive journalism
• Political activism in restricted countries
• Any activity where IP exposure has serious consequences

Public Wi-Fi Usage

• Public networks are unstable and prone to disconnections
• Kill switch prevents exposure during network transitions
• Protects against malicious actors on the same network

Countries with Strict Internet Laws

• Using VPNs where they're restricted or monitored
• Accessing blocked content
• Any activity that could have legal consequences

Optional Scenarios (Personal Preference)

General Browsing

• Adds extra privacy assurance
• May cause brief interruptions if VPN drops
• Good for privacy-conscious users

Streaming Services

• Usually not critical for streaming
• Kill switch can interrupt viewing if connection drops
• Consider disabling for better user experience

Online Gaming

• May cause game disconnections if VPN drops
• Typically not necessary unless privacy is critical
• Consider your priorities: privacy vs. uninterrupted gameplay

How to Enable Kill Switch on Each Platform

iOS Setup

1. Open EdgeVPN app on your iPhone or iPad
2. Tap the menu icon (three lines) or go to Settings
3. Find "Kill Switch" or "Network Lock"
4. Toggle the switch to ON (it should turn green)
5. iOS-Specific Option: For maximum protection:
   • Open iOS Settings > General > VPN & Device Management
   • Tap on EdgeVPN configuration
   • Enable "Connect On Demand"
   • This ensures the VPN auto-connects and prevents unprotected connections

Important iOS Note: iOS has built-in VPN supervision that helps enforce the kill switch. For best results, use both EdgeVPN's kill switch and iOS's "Connect On Demand" feature.

Android Setup

1. Open EdgeVPN app on your Android device
2. Tap menu icon and select Settings
3. Find "Kill Switch" or "Network Lock"
4. Toggle it to ON
5. Android-Specific Enhancement:
   • Open Android Settings > Network & Internet > VPN
   • Tap the gear icon next to EdgeVPN
   • Enable "Always-on VPN"
   • Enable "Block connections without VPN"
   • This provides system-level kill switch protection

Android Advantage: Android's native "Block connections without VPN" works even if the EdgeVPN app crashes, providing an extra layer of protection.

Windows Setup

1. Launch EdgeVPN on Windows
2. Click the Settings icon (gear symbol)
3. Navigate to "Security" or "Connection" tab
4. Find "Kill Switch" or "Network Lock"
5. Check the box or toggle the switch to enable
6. Optional: Select kill switch mode:
   • Automatic: Blocks internet only when VPN unexpectedly drops
   • Always: Blocks internet whenever VPN is disconnected (most secure)
7. Click Apply or Save

Windows Note: You may need administrator privileges to enable the kill switch. The app will prompt you if elevation is required.

macOS Setup

1. Open EdgeVPN on your Mac
2. Click EdgeVPN in the menu bar (top right)
3. Select Preferences or Settings
4. Go to "Security" or "Connection" tab
5. Enable "Kill Switch" or "Network Lock"
6. Choose mode:
   • Automatic: Blocks only on unexpected disconnections
   • Always: Blocks whenever VPN is off
7. Close settings to save

macOS Note: The kill switch requires macOS 10.13 (High Sierra) or later for optimal functionality.

Linux Setup

1. Open EdgeVPN terminal interface or GUI
2. Edit configuration file or use GUI settings
3. Command line:

   edgevpn config set killswitch enabled
   

4. Or in GUI: Navigate to Settings > Security > Enable Kill Switch
5. Test the kill switch: Disconnect VPN and verify internet is blocked

Linux Note: The kill switch modifies iptables rules. Ensure you have sudo privileges.

Testing Your Kill Switch

After enabling the kill switch, verify it's working properly:

Basic Test

1. Connect to EdgeVPN and verify you're protected
2. Check your IP: Visit whatismyip.com and note the VPN IP address
3. Force disconnect: In EdgeVPN, click "Disconnect" or close the app
4. Refresh whatismyip.com: The page should fail to load
5. Try browsing: No websites should load while VPN is disconnected
6. Reconnect: Connect to VPN again; internet should resume

Advanced Test

1. Connect to EdgeVPN
2. Start a download or ping: Open terminal and run ping 8.8.8.8 -t (Windows) or ping 8.8.8.8 (Mac/Linux)
3. Force disconnect VPN: Unplug ethernet cable, disable Wi-Fi, or kill EdgeVPN process
4. Observe: Ping should stop immediately, confirming no internet access
5. Reconnect: Ping should resume when VPN reconnects

Leak Test Websites

Use these services to verify no leaks occur:

• ipleak.net: Comprehensive leak test (IP, DNS, WebRTC)
• dnsleaktest.com: Specific DNS leak testing
• browserleaks.com: Tests for various leak types

Run these tests while connected, then test the kill switch by disconnecting. Pages should fail to load with kill switch active.

Kill Switch Modes

EdgeVPN offers two kill switch modes on some platforms:

Automatic Mode (Recommended)

• Activates: Only when VPN disconnects unexpectedly
• Deactivates: When you manually disconnect the VPN
• Best for: Most users who want protection from accidental disconnections
• User experience: Allows normal internet when you intentionally disconnect

Always-On Mode (Maximum Security)

• Activates: Whenever the VPN is not connected, for any reason
• Requires: VPN connection for all internet access
• Best for: High-security scenarios, torrenting, sensitive activities
• User experience: No internet access without VPN, even if you disconnect manually

Recommendation: Use Automatic mode for general use, Always-On mode for torrenting or high-privacy needs.

Troubleshooting Kill Switch Issues

Internet Doesn't Work After Disabling Kill Switch

Problem: Kill switch rules persist after disabling.

Solution:

1. Restart EdgeVPN app
2. Restart your device to clear network rules
3. Manually disconnect and reconnect to your network

Kill Switch Blocks Internet Even When Connected

Problem: Overly aggressive firewall rules.

Solution:

1. Disconnect from VPN
2. Disable kill switch in settings
3. Reconnect to VPN
4. Re-enable kill switch (this refreshes the rules)

Kill Switch Doesn't Work (Internet Leaks)

Problem: Kill switch not properly configured.

Solution:

1. Use platform-native VPN options (Android's "Block connections without VPN", iOS "Connect On Demand")
2. Update EdgeVPN to the latest version
3. Reinstall the app if issues persist
4. Test thoroughly using methods described above

Apps Still Connect Despite Kill Switch

Problem: Some apps use techniques to bypass VPN.

Solution:

1. Check split tunneling settings,ensure problematic apps aren't excluded
2. Use Always-On mode instead of Automatic
3. Report to support if specific apps bypass the kill switch

Best Practices

Follow these guidelines for optimal kill switch protection:

1. Always Enable for Torrenting: This is non-negotiable for P2P activities
2. Test After Enabling: Verify it works before relying on it
3. Use Always-On Mode for High-Risk Activities: Maximum protection when it matters most
4. Combine with Auto-Connect: Automatically connect on untrusted networks
5. Keep EdgeVPN Updated: New versions improve kill switch reliability
6. Monitor Connection Status: Watch for frequent disconnections that might indicate network issues
7. Use Platform-Native Options: Enable OS-level VPN enforcement when available

Kill Switch and Battery Life

The kill switch has minimal impact on battery life:

• No additional drain when VPN is connected normally
• Slightly increased CPU usage only during disconnection events
• Network monitoring is efficient and lightweight

You can safely enable the kill switch on mobile devices without worrying about significant battery impact.

Frequently Asked Questions

Does the kill switch slow down my connection? No. The kill switch only activates when the VPN disconnects. During normal operation, there's zero performance impact.

What happens if I need internet during a VPN disconnection? Disable the kill switch temporarily, or use Automatic mode instead of Always-On mode for more flexibility.

Can I whitelist certain apps to bypass the kill switch? Use split tunneling to exclude specific apps from the VPN entirely. This is safer than creating kill switch exceptions.

Will the kill switch protect me if my device crashes? On most platforms, yes. The kill switch operates at the system level and remains active even if the app crashes. However, a full device reboot will reset it until you reconnect.

Is the kill switch legal everywhere? The kill switch itself is legal, but VPN usage may be restricted in some countries. Check local laws regarding VPN use.

The kill switch is your last line of defense against IP exposure and data leaks. By enabling and properly configuring this essential feature, you ensure your privacy is protected even when things go wrong with your VPN connection.