In this case study, a water authority addresses the challenges of cyber-physical defense of unmanaged, digitally connected conveyance system assets. The red team exercise simulated a physical breach with the team gaining access to the network via a physical connection at a control panel at two of the unmanaged locations. The result was a success with PacketViper protecting the critical operations network, blocking the attacker’s ability to further penetrate the network while alerting operators of the attack.