Para openSUSE Tumbleweed execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/YaST:Head:Rebuild/openSUSE_Tumbleweed/YaST:Head:Rebuild.repo
zypper refresh
zypper install yast2-ftp-server
Para openSUSE Leap 15.2 execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/YaST:Head:Rebuild/openSUSE_Leap_15.2/YaST:Head:Rebuild.repo
zypper refresh
zypper install yast2-ftp-server
Para openSUSE Factory execute o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/YaST:Head:Rebuild/openSUSE_Factory/YaST:Head:Rebuild.repo
zypper refresh
zypper install yast2-ftp-server