Okay, thank you for your reply. Another question: is it intentional that well-nigh all directories outside /home are list-accessible by anyone? It is at least quirky that (although I could not access the files themselves, fortunately) the contents of /boot can be freely listed, thus revealing the kernel version and literally every former patch. Not a security issue itself, but can be used for preparing an attack. Methinks /boot and /proc directories should be completely denied (including listing files) for anyone excluding root.