Laura wants to harden an ICS and SCADA devices her organization uses to manage critical infrastructure. The devices are old and unsupported, without recent updates. What hardening techniques are most likely to be available to her to help deal with these devices?

Since ICS and SCADA devices need connectivity as part of their design, Laura knows that using segmentation to place the devices in a secure network is likely her best hardening option. Isolating the devices would break the functionality of ICS/SCADA systems. Neither ICS nor SCADA devices typically have support for host-based firewalls or host-based IPS.