iptables

• is the software firewall that is included with most Linux distributions by default
• ufw (Uncomplicated FireWall) is a command-line wrapper for iptables

Installation

apt-get

1. install iptables

  apt-get install iptables

2. verify iptables was installed

  which iptables

Subpages

• iptables - Route Incoming Packets from a Port to another Port
• iptables-persistent

Commands

• digitalocean - tutorial