  Network security morning (NSM) is essential for any cybersecurity system,
where the average cost of a cyber attack is 1.1 million. No matter how secure a
system, it will eventually fail without proper and continuous monitoring. No
wonder that the cybersecurity market is expected to grow up to $170.4 billion
in 2022. However, the majority of legacy industries do not invest in NSM
implementation until it is too late due to the initial and operation costs and
static unutilized resources. Thus, this paper proposes a novel dynamic Internet
of things (IoT) architecture for an industrial NSM that features a low
installation and operation cost, low power consumption, intelligent
organization behavior, and environmentally friendly operation. As a case study,
the system is implemented in a mid-range oil a gas manufacturing facility in
the southern states with more than 300 machines and servers over three remote
locations and a production plant that features a challenging atmosphere
condition. The proposed system successfully shows a significant saving (>65%)
in power consumption, acquires one-tenth of the installation cost, develops an
intelligent operation expert system tool as well as saves the environment from
more than 500mg of CO2 pollution per hour, promoting green IoT systems.
