VPN Killswitch

hack-off.sh

#!/bin/bash

sudo ufw reset
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow 4444/tcp
sudo ufw enable

# restart network manager
sudo service network-manager restart

vpn-ufw-killswitch.sh

./hack-off.sh

# connect to vpn
nordvpn c

# take all connections down as a precaution before resetting ufw
sudo ifconfig eth0 down
sudo ifconfig wlan0 down

# reset ufw settings
sudo ufw --force reset

# set default behaviour of and enable ufw
sudo ufw default deny incoming
sudo ufw default deny outgoing
sudo ufw enable

# allow local traffic
sudo ufw allow to 192.168.0.1/24
sudo ufw allow in from 192.168.0.1/24

# bring connections back up
sudo ifconfig eth0 up
sudo ifconfig wlan0 up

# allow vpn connection to be established
sudo ufw allow out 1194/udp

# allow vpn ip address
#sudo ufw allow in from $MY_IP to any

# allow all traffic over VPN interface
sudo ufw allow in on tun0 from any to any
sudo ufw allow out on tun0 from any to any

# restart network manager
sudo service network-manager restart