UFW full removal script

ufw-removal.sh

#!/bin/sh
# This script completely removes all the iptables chains ufw creates and doesn't remove after install

if [ "${EUID:-$(id -u)}" -ne 0 ]; then
        echo Run this as root.
        return 1 2> /dev/null
        exit 1
fi

if command -v ufw 2> /dev/null; then
        echo Uninstalling ufw.
        apt-get -qq remove ufw > /dev/null
fi

echo Removing leftover ufw rules.
iptables-save | grep -v ufw | iptables-restore
ip6tables-save | grep -v ufw | ip6tables-restore

echo Saving changes to persist after reboot.

if [ -f /etc/iptables/rules.v4 ]; then
        echo Backing up /etc/iptables/rules.v4 to /etc/iptables/rules.v4.ufw
        mv /etc/iptables/rules.v4 /etc/iptables/rules.v4.ufw
fi

if [ -f /etc/iptables/rules.v6 ]; then
        echo Backing up /etc/iptables/rules.v6 to /etc/iptables/rules.v6.ufw
        mv /etc/iptables/rules.v6 /etc/iptables/rules.v6.ufw
fi

iptables-save > /etc/iptables/rules.v4
ip6tables-save > /etc/iptables/rules.v6

echo Done! Have a great ufw free day!