I've reviewed a few different NAS devices at this stage, and one of the most intriguing yet exciting opportunities I've been given in that world was the opportunity to review the Zettlab D6 Ultra.
For now, it does not support navigation properties, complex types, owned types, shadow properties, or inheritance, but they are in the roadmap.
Just like the original Fail2Ban, this configurable and easy to use solution works by scanning logs, in this case the Windows event log from the Win32-OpenSSH service and bans IPs with too many failed ...