VPN Killswitch Bash Script

VPN Killswitch is a simple bash script that prevents your real IP address and Internet activities from being revealed if you lose connection to your VPN.

How does it work?

VPN Killswitch uses nmcli to check the status of your VPN connection. In the event that connection is lost, ifconfig down is used to disconnect your ethernet adapter.

Requirements

• nmcli
• libnotify

Setup & Usage

1. Set the device variable:

device=eth0

(If you're not sure what to use, run ifconfig and use whichever device shows your external IP)

2. Make the script executable:

sudo chmod +x vpnkillswitch.sh

3. Run VPN Killswitch

sudo vpnkillswitch

VPN Killswitch needs to be run as root so it can disable your ethernet adapter.

Restoring Internet Connection

To restore your internet connection run VPN Killswitch with the up parameter:

sudo vpnkillswitch up