atftp from OBS:Server:Unstable project
Select Your Operating System
Add repository and install manually
For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/OBS:Server:Unstable/openSUSE_Factory_zSystems/OBS:Server:Unstable.repo zypper refresh zypper install atftp
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/OBS:Server:Unstable/15.5/OBS:Server:Unstable.repo zypper refresh zypper install atftp