ufw-setup.sh

#!/bin/bash
apt-get -y update

# install the firewall
echo 'Installing UFW'
apt-get install -y ufw

echo 'Configuring UFW'
# disable IPv6
# sed -i "s/IPV6=yes/IPV6=no/" /etc/default/ufw

# deny all incoming and outgoing connections
ufw default deny incoming
ufw default allow outgoing

# allow HTTP and HTTPS, and ssh
ufw allow 80/tcp
ufw allow 443/tcp
ufw allow 2280/tcp
# allow SMTP, Submission and IMAPS
ufw allow smtp
ufw allow submission
ufw allow imaps

# enable ufw
ufw enable