plasma5-firewall from home:Vogtinator:pl527lp155 project
Select Your Operating System
Add repository and install manually
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Vogtinator:pl527lp155/15.5/home:Vogtinator:pl527lp155.repo zypper refresh zypper install plasma5-firewall