Analysis of In-order Packet Delivery Network Policy Enforcement Function
Industrial Control System (ICS) networks face novel challenges in risk management, feature agility, and deployment flexibility. Essential hardware control systems may have a lifetime of decades while the need for business features and the network security landscape evolve on a daily basis. Even the mix of common protocols for network connectivity is likely to undergo significant market disruption over the 50+ year lifetime of a large industrial complex. Given this reality, the University of Houston Networking Lab  has embarked upon an effort, facilitated by the Department of Energy CREDC program, to decouple the long development cycles of hardened industrial equipment from the ever-changing realities of both the local and wide-area networks they must use to transport essential sensor data and control messages.