OpenSUSE 12.3
This is the Linux distribution my server was based on. More information is available here.
If you are looking to install openSUSE, you should look at installing openSUSE Leap 15.6, the latest version.
If you are still looking to install openSUSE, there is more details in obtaining openSUSE 12.3.
THIS RELEASE IS NO LONGER SUPPORTED
Installation notes
No installation issues we're found with this release.
Information
openSUSE 12.3 was released on 13th March 2013. It is an open-source distribution and is free of charge. It is developed by the community and sponsored by Novell.