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.

# Install ufw
sudo apt-get install ufw

# Enable IPv6 in ufw configuration
sudo sed -i 's/IPV6=.*/IPV6=yes/' /etc/default/ufw

# Disable ufw to reconfigure rules
sudo ufw disable

# Enable ufw with the new settings
sudo ufw enable

# Set default rules for incoming ond outgoing traffic
sudo ufw default deny incoming
sudo ufw default allow outgoing

# Allow incoming traffic on port 22 (SSH)
sudo ufw allow 22/tcp

# Allow incoming traffic on port 443 (HTTPS SSL)
sudo ufw allow 443/tcp

# Allow incoming traffic on port 80 (HTTP)
ufw allow 80/tcp