The handlers over at the Internet Storm Centre have been noticing a disturbing trend lately, namely, seeing the DNP protocol appearing on the open Net. You probably don't care about this because you've never heard of it before, but the protocol called DNP is used by process automation systems (SCADA) that control things like power generators and substations, pipelines, and other systems that have points of control scattered far and wide, systems in which a problem in one place can cascade into major problems everywhere downstream of the first problem. Now, maybe it's just me, but I find it worrisome …