The online world is fraught with security risks. While VPNs serve as a line of defense, what happens when the VPN connection drops? Enter the VPN kill switch, a critical feature that ensures continuous protection.

This article delves into the concept of a VPN kill switch, its importance, how it works, and the various situations where it proves to be invaluable.

Overview of a VPN Kill Switch

A VPN kill switch, also referred to as an internet kill switch, is a feature built into VPN software. It automatically severs your device’s connection to the internet when the VPN connection drops unexpectedly.

This automatic disconnection helps maintain the confidentiality of your IP address and other sensitive data, even if the VPN connection is temporarily unavailable.

This feature is particularly crucial in the world of online security, as it provides an extra layer of protection, keeping your data secure and your online activities anonymous, even during instances of VPN disconnection.

Why Is a VPN Kill Switch Necessary?

The primary function of a VPN is to route your internet traffic through an encrypted tunnel, keeping your data and online activities private. However, even the most reliable VPNs can encounter temporary connectivity issues.

VPN Kill Switch Encryption

During such instances, without a VPN kill switch, your device could automatically reconnect to the internet using your regular, unsecured connection.

This could unintentionally expose your real IP address and personal data to your Internet Service Provider (ISP), websites, and potentially even cybercriminals.

Therefore, a VPN kill switch is necessary as it acts as a safety net, preventing any data transmission over an unsecured connection.

It ensures that your IP address and online activities remain private, providing an extra layer of security and maintaining your online privacy at all times.

How Does a VPN Kill Switch Work?

A VPN kill switch operates by continuously monitoring your VPN connection. It detects any changes or drops in the VPN connection and reacts by blocking your device’s access to the internet. Here is a step-by-step breakdown of how a VPN kill switch works:

  1. Monitoring: The kill switch keeps a constant check on your VPN connection status and any changes in your IP address.
  2. Detecting: If there are any disruptions or changes that might affect your VPN connection, the kill switch detects them instantly.
  3. Blocking: Depending on the type of VPN and the settings you’ve chosen, the kill switch will block internet access to either specific apps or your entire device.
  4. Restoring: Once the VPN connection is back and working as expected, the kill switch restores your internet connection automatically.

The Importance of a Reliable VPN Kill Switch

Not all VPN services offer a reliable kill switch. Some might include the feature, but it may not function as expected. Therefore, it’s crucial to select a VPN service that provides a reliable, functional kill switch.

For example, NordVPN is one of the best VPN services on the market known for its effective kill switch feature. It offers two types of kill switches – one for specific apps and another for the entire system. Therefore, no matter what you’re doing online, with NordVPN, your activities remain private.

If you’re looking for more in-depth analysis and recommendations on VPNs with a reliable kill switch feature, check out my guide for the best VPN services. In that guide, i tested the kill switch feature by several VPN services and reported my findings.

When Does a VPN Kill Switch Activate?

VPN Kill Switch On/Off Button

A VPN kill switch activates the moment it detects a drop in your VPN connection. Here are a few scenarios when this might occur:

  • Your internet disconnects from your VPN server due to connectivity issues.
  • You decide to switch VPN servers.
  • You experience unstable network connections, such as using public Wi-Fi.
  • Your computer undergoes an update overnight and then reconnects to the internet without opening your VPN.
  • You start using a new firewall and forget to add an exception for your VPN, causing the firewall to block your VPN.
  • Someone borrows your device and restarts it without switching your VPN back on.

Types of VPN Kill Switches

There are two primary types of VPN kill switches – system level and application level.

System Level VPN Kill Switch

A system-level VPN kill switch identifies when you’re disconnected from the VPN service and prevents your device from connecting to the internet via your Wi-Fi or mobile data.

By blocking your entire internet connection, it effectively avoids IP leaks, providing a robust layer of protection.

Application Level VPN Kill Switch

An application-level kill switch allows you to choose specific apps that you want to stop from connecting to the internet when the kill switch activates.

The selected apps will then cease to function in the event of a VPN connection failure, protecting your data. This type of kill switch offers more flexibility and control over the switch’s operation.

Why Should You Use a VPN Kill Switch?

A VPN kill switch is your last line of defense to ensure that your IP address remains hidden. It also ensures that no one can access your unencrypted data if your VPN connection drops.

It is a critical safety feature that cuts off your device from the internet if your VPN connection drops unexpectedly.

By doing this, it ensures that no data is transmitted or received over your internet connection while you are not protected by your VPN.

It prevents any data leakage that could otherwise expose your identity or activities to third parties, including your Internet Service Provider (ISP), hackers, or government agencies.

Digital Fingerprint.

Moreover, a VPN Kill Switch is especially important for those who require an extra level of privacy and security in their online activities.

This includes journalists working in sensitive areas, activists, or anyone dealing with confidential information.

However, even for everyday internet users, a kill switch can provide peace of mind knowing that your data and privacy are always protected, even when the unexpected occurs.

Who Should Use a VPN Kill Switch?

While an occasional drop in VPN connectivity might not be a significant concern for most people, there are certain groups of individuals for whom this level of privacy is crucial. These include:

  • Activists and journalists who wish to remain untracked.
  • Users of peer-to-peer transfer software who need to mask their IP addresses.
  • Individuals handling confidential documents who can’t afford to have their security compromised.
  • Torrent users who want to remain anonymous.

Risks of Using a VPN Without a Kill Switch

Using a VPN is a great way to keep your online activity private and secure. However, VPNs aren’t foolproof.

List of exposed IP Addresses.

There are times when your VPN connection might drop, exposing your IP address and sensitive data. Here are some of the biggest risks of using a VPN without a kill switch:

How to Choose the Right Kill Switch VPN

When looking for the right VPN provider, here are a few things to consider:

  • Reliable and customizable kill switch.
  • No visible impact on device performance.
  • Top-quality security features.
  • Audited no-logs policy.
  • Compatibility with major operating systems.


  1. Activate the Kill Switch: Once you’ve chosen a VPN with a kill switch, you need to ensure the kill switch is activated. This is usually in your VPN settings and can typically be activated with a simple toggle.VPN Kill Switch: Turn On.
  2. Test the Kill Switch: To test the VPN kill switch, you first need to connect to a VPN server. After ensuring your connection is secure, manually disconnect from the VPN without disconnecting from the internet.
  3. Check Your Internet Connection: If your VPN’s kill switch is functioning correctly, your internet connection should be immediately terminated once you disconnect from the VPN. This can be tested by attempting to load a webpage or an online service. If the webpage fails to load, it indicates that the kill switch is functioning correctly.
  4. Use Online Tools: There are online tools like our IP checker that can check whether your IP address changes when the VPN disconnects. If your original IP address is revealed when the VPN connection drops, it means the kill switch isn’t working properly.
  5. Repeat the Test: For a thorough test, repeat the process using different servers or under different network conditions. This helps ensure that the kill switch works on all servers and under any conditions.
  6. Check for DNS Leaks: While testing the VPN kill switch, also check for DNS leaks. These can expose your IP address even if the kill switch is functioning correctly. You can use online tools, like ‘DNS Leak Test‘, to check this.
  7. Contact Customer Support: If you find any issues with the kill switch or are unsure if it’s working correctly, contact the VPN’s customer support for further assistance.
  8. Keep VPN Updated: Lastly, always make sure

Should I Leave the VPN Kill Switch On All The Time?

Is The VPN Kill Switch Available on All Devices?

How To Disable VPN Kill Switch?


A VPN kill switch automatically cuts your connection from the Internet if your VPN connection suddenly drops out.

The feature is an extra security layer, protecting your data, and keeping you anonymous even if the VPN turns off.

It’s an essential feature that every VPN user should consider for maintaining online privacy and security.

About the Author

Raymond Kenney, a master's graduate in Cybersecurity from Boston University, is a seasoned IT professional and expert in VPNs and online privacy. With over ten years of industry experience, Raymond has produced multiple authoritative articles on network security and data privacy. Renowned for his meticulous approach, he conducts comprehensive reviews on various VPN services, assessing their features and security protocols. His expert advice is based on extensive research and practical knowledge.

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