Install shorewall6-lite by entering the following commands in the terminal:
sudo apt update sudo apt install shorewall6-lite
Description:
Shorewall (lite version with IPv6 support)
Shorewall6 allows you to describe your firewall/gateway requirements using entries in a set of configuration files. It reads those configuration files and, with the help of the iptables utility, configures Netfilter to match your requirements. . Shorewall6 supports a wide range of router/firewall/gateway applications, traffic shaping and almost every type of VPN. . The shorewall6-lite package is designed to allow you to maintain all Shorewall configuration information on a single system within your network. . This package contains IPv6 support.
Homepage: http://www.shorewall.net
Version: 5.1.12.2-1
Section: universe/net