shorewall
An iptables-based firewall for Linux systems
The Shoreline Firewall, more commonly known as "Shorewall", is a Netfilter (iptables) based firewall that can be used on a dedicated firewall system, a multi-function gateway/ router/server or on a standalone GNU/Linux system.
There is no official package available for openSUSE Leap 15.6Distributions
openSUSE Tumbleweed
SUSE SLE-15-SP1
RedHat RHEL-7
Unsupported distributions
The following distributions are not officially supported. Use these packages at your own risk.