IPv6 Toggle Script, Disables or enables IPv6 system-wide

toggle_ipv6.sh

#!/bin/bash

# IPv6 Toggle Script
# Disables or enables IPv6 system-wide

function disable_ipv6() {
    echo "Disabling IPv6..."
    sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
    sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
    sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=1
    echo "net.ipv6.conf.all.disable_ipv6=1" | sudo tee -a /etc/sysctl.conf > /dev/null
    echo "net.ipv6.conf.default.disable_ipv6=1" | sudo tee -a /etc/sysctl.conf > /dev/null
    echo "net.ipv6.conf.lo.disable_ipv6=1" | sudo tee -a /etc/sysctl.conf > /dev/null
    sudo sysctl -p
    echo "IPv6 has been disabled."
}

function enable_ipv6() {
    echo "Enabling IPv6..."
    sudo sysctl -w net.ipv6.conf.all.disable_ipv6=0
    sudo sysctl -w net.ipv6.conf.default.disable_ipv6=0
    sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=0
    sudo sed -i '/net.ipv6.conf.*.disable_ipv6/d' /etc/sysctl.conf
    sudo sysctl -p
    echo "IPv6 has been enabled."
}

# Main Script Execution
echo "Do you want to enable or disable IPv6? (enable/disable)"
read -r action

case "$action" in
    disable)
        disable_ipv6
        ;;
    enable)
        enable_ipv6
        ;;
    *)
        echo "Invalid option. Please type 'enable' or 'disable'."
        exit 1
        ;;
esac