strongswan from home:ojkastl_buildservice project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ojkastl_buildservice/openSUSE_Tumbleweed/home:ojkastl_buildservice.repo zypper refresh zypper install strongswan