SCADA firewall

Why SCADA Firewalls Need to be Stateful – Part 2 of 3

In Part 1 of this series, I explained what a stateless firewall is and the hazards of stateless security.  In this article I will show you just how dangerously insecure these devices are.

Defense in Depth: Layering Multiple Defenses - Part 2 of 2

In my earlier column on the philosophy of Defense in Depth, I discussed how relying on a single defensive solution exposes a system to a single point of failure. No matter how well designed or strong that single defense is, either resourceful adversaries or Murphy’s Law eventually results in the defense malfunctioning or being bypassed. When that happens, the entire system is wide open to attack.

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