shorewall6 5.2.3.4-1 (amd64 binary) in ubuntu focal

 Shorewall6 allows firewall/gateway requirements to be described 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 these requirements.
 .
 Shorewall6 supports a wide range of router/firewall/gateway applications,
 traffic shaping and almost every type of VPN.
 .
 This package contains IPv6 support.