[tru3_power]

Super common. A lot of companies have this hard on the outside gooey on the inside model (aka flat network structure).

[rckoepke]

Most petrochemical companies have an onion structure. There are lots of layers of firewalls with what are supposed to be limited communication paths for specific applications.

We need to move to using physical layers where data can only be transmitted in one direction (and then use something like UDP)