You can install and run Manu Admin Mod to do exactly that. This "mod" will not make your server unranked. It's just a program that runs stand-alone and gets its info from the log files. So you do need to have direct access to the log files for it to work. But if you have that, it works great. I've been using it for several months now. It has one downside though, it cannot ban/kick for things that do not show up in the log, like last stand.