Install arno-iptables-firewall by entering the following commands in the terminal:
sudo apt update sudo apt install arno-iptables-firewall
single- and multi-homed firewall script with DSL/ADSL support
Unlike other lean iptables frontends in Debian, arno-iptables-firewall will setup and load a secure, restrictive firewall by just asking a few question. This includes configuring internal networks for internet access via NAT and potential network services (e.g. http or ssh). . However, it is in no way restricted to this simple setup. Some catch words of additional features, that can be enabled in the well documented configuration file are: DSL/ADSL, Port forwarding, DMZ's, portscan detection, MAC address filtering.