Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke/openSUSE_Tumbleweed/home:mnhauke.repo
zypper refresh
zypper install fwknop-gui
Para openSUSE Factory ARM execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke/openSUSE_Factory_ARM/home:mnhauke.repo
zypper refresh
zypper install fwknop-gui
Para 15.5 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:mnhauke/15.5/home:mnhauke.repo
zypper refresh
zypper install fwknop-gui