For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:JMarcosHP01:ServerManagement/openSUSE_Tumbleweed/home:JMarcosHP01:ServerManagement.repo
zypper refresh
zypper install firewalld
For openSUSE Slowroll run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:JMarcosHP01:ServerManagement/openSUSE_Slowroll/home:JMarcosHP01:ServerManagement.repo
zypper refresh
zypper install firewalld
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:JMarcosHP01:ServerManagement/16.0/home:JMarcosHP01:ServerManagement.repo
zypper refresh
zypper install firewalld