For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_X11_RemoteDesktop/openSUSE_Tumbleweed/home:ojkastl_buildservice:Branch_X11_RemoteDesktop.repo
zypper refresh
zypper install rustdesk-server
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_X11_RemoteDesktop/15.6/home:ojkastl_buildservice:Branch_X11_RemoteDesktop.repo
zypper refresh
zypper install rustdesk-server
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice:Branch_X11_RemoteDesktop/15.5/home:ojkastl_buildservice:Branch_X11_RemoteDesktop.repo
zypper refresh
zypper install rustdesk-server