At a customer we still have to keep up an ancient Suse 6.x VM, it has a legacy and proprietary software in it which has to be kept alive.
No way to move that sw to another OS, don't ask ... That VM only runs sshd v1 ... so far I kept my openssh package on the host at 7.5 via masking ... I now have to replace the gentoo server and set up the vitualization host with debian ("don't ask" again ;-)). I think of setting up a tiny gentoo VM as a "jumphost" into the Suse VM. Will I be able to install such a "kept old" gentoo machine from scratch or does some have a better idea? I even thought of docker ...