Intrusion detection involves connections coming from the outside. These attacks originate inside the network, from the compromised equipment. Except on extreme

Intrusion detection involves connections coming from the outside. These attacks originate inside the network, from the compromised equipment. Except on extremely controlled networks, this would be very hard to detect. It gets even worse when you consider that the Chinese had/have a distributed network of compromised machines. Imagine using a Google edge server as a dead drop...