0-block_all_incoming_traffic_but

#!/usr/bin/env bash
# Configures a ufw firewall to block all incoming traffic
#+ except for TCP ports 22, 443 and 80.

sudo apt-get install ufw -y
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow 22/tcp
sudo ufw allow 443/tcp
sudo ufw allow 80/tcp
sudo ufw enable
sudo ufw status