WireGuard auto control script

wg_auto_toggle.md

Setting up a WireGuard VPN Script on Ubuntu

Prerequisites:

• Ubuntu system with WireGuard installed and configured

• Root access to your Ubuntu system

Create a new file with your favorite text editor, for example:

sudo nano ~/wg_auto_toggle.sh

Paste the following code into the file and save it.

sudo chmod +x ~/wg_auto_toggle.sh

Now, every time you run the script, it will automatically detect the status of your VPN and toggle it on or off as needed. You can run the script by executing:

sudo bash ~/wg.sh

wg_auto_toggle.sh

#!/bin/bash

VPN_CONFIG="example" # this is your wg config file name in /etc/wireguard
VPN_UP=0

# Function to check if VPN is up
check_vpn_status() {
  if ip link show "$VPN_CONFIG" | grep -q UP; then
    VPN_UP=1
  else
    VPN_UP=0
  fi
}

# Function to toggle VPN
toggle_vpn() {
  check_vpn_status
  if [ $VPN_UP -eq 1 ]; then
    sudo wg-quick down $VPN_CONFIG
    echo "VPN turned off."
  else
    sudo wg-quick up $VPN_CONFIG
    if [ $? -eq 0 ]; then
      echo "VPN turned on."
      sleep 5
      if curl --silent --head http://clients1.google.com/generate_204 | head -n 1 | grep -q "204"; then
        echo "VPN is working properly."
      else
        echo "VPN is not working properly."
      fi
    else
      echo "VPN is already up."
    fi
  fi

  echo "Your IPv4 address: $(curl -s ipv4.ip.sb)"
  echo "Your IPv6 address: $(curl -s ipv6.ip.sb)"
  echo "Your DNS servers:"
  grep nameserver /etc/resolv.conf | awk '{print $2}'
}

# Main
echo "nameserver 45.90.28.53" | sudo tee /etc/resolv.conf > /dev/null
toggle_vpn
echo "Press any key to exit..."
read -n 1