Howto enable ufw firewall on Ubuntu

ufw_firewall.sh

#!/bin/bash

# Check ufw status
sudo ufw status

# Enable ufw
sudo ufw enable

# Check ufw status again
sudo ufw status

# To set the default UFW incoming policy to deny
sudo ufw default deny incoming

# To set the default UFW outgoing policy to allow
sudo ufw default allow outgoing

# Check configuration again
sudo ufw status verbose
" Output:
" Status: active
" Logging: on (low)
" Default: deny (incoming), allow (outgoing), deny (routed)