Uncomplicated Firewall

interfaz CLI para configuración IPTABLES

• https://www.digitalocean.com/community/tutorials/how-to-setup-a-firewall-with-ufw-on-an-ubuntu-and-debian-cloud-server
• https://wiki.ubuntu.com/UncomplicatedFirewall

• permitir acceso a un puerto desde un rango IP:

  # ufw allow from 192.168.1.0/24 to 192.168.1.50 port ssh