NB: Some VPN services, such as NordVPN, Proton VPN or Surfhark, offer an advanced Kill Switch option, in addition to the classic function. If the confidentiality of your traffic and your personal data is an absolute priority, you can also activate it. But keep in mind that you will have to authorize the service to operate in the background, and that you will no longer be able to access the Internet without VPN, even if you have voluntarily disabled it.