Zero Belief Community Entry (ZTNA) is a safe distant entry service. It verifies distant customers and grants them entry to the correct sources on the proper occasions primarily based on identification and context insurance policies. That is half 3 in our weblog sequence about ZTNA for operational know-how (OT). Try Half 1 for why ZTNA beats out always-on VPNs for OT distant entry and Half 2 for the way ZTNA reduces the assault floor by proscribing entry strategies and verifying distant customers’ safety posture.
Video cameras are in all places, together with in services with the strictest bodily entry controls. Even when you belief a person to enter a delicate space, you continue to want to watch their actions as soon as they’re within the door. Seeing a suspicious exercise, you may step in to cease it. And if issues crop up after the go to, reviewing a recording may also help pinpoint what went improper.
Monitoring and recording actions are equally crucial in relation to distant customers accessing your OT networks. It’s not sufficient to confirm the identification of distant workers, distributors, and contractors. Neither is it sufficient to know who’s linked to what OT/ICS belongings. You additionally must know what customers are doing throughout distant entry periods. Most organizations lack that visibility at this time, a shortcoming for cybersecurity compliance, governance, the power to cease and get better from breaches, and incident investigation.
Conveniently, Cisco Safe Gear Entry (SEA) offers you an all-in-one answer to grant distant entry, implement entry controls, and monitor and document distant session exercise. Listed here are 3 ways you may benefit from Cisco SEA to actively management OT distant entry.
1 – Monitor, be a part of, and terminate energetic periods
See an inventory of all energetic periods on the Cisco SEA console. By clicking on the session between ‘Person A’ and ‘Asset B’ you may watch session actions as they occur, together with instructions despatched to the asset. Watching a vendor configure an OT/ICS asset could be useful for coaching, for instance. And when you see one thing suspicious, like an try to vary the code or a variable in a programmable logic controller (PLC), you may terminate the session with a click on and disconnect the distant consumer. Distant session termination is required by ISA/IEC62443-3-3 FR2.
2 – Preserve an entire log of previous periods
Cybersecurity greatest practices require sustaining an in depth historical past of all previous periods, helpful for safety audits, forensic investigations, and regulatory compliance. The EU’s NIS2 Directive, for instance, requires a full audit path for each occasion that impacts crucial infrastructure and OT safety requirements similar to ISA/IEC62443-3-3 require information of all login makes an attempt. Cisco SEA logs each system-generated and user-generated occasions. For instance, assessment how distant customers authenticate, together with usernames, time, system posture, and session actions. Or see who added new customers or new belongings to the system.
3 – File periods to see what occurred
Optionally document periods for chosen belongings, just by deciding on the asset on the console and checking a field. Recordings enrich your audit path and could be significantly useful for troubleshooting. If an asset like a robotic arm, wind turbine, or freeway signal stops working, for instance, you may uncover {that a} vendor just lately upgraded the software program or made a typo in a brand new configuration. Sooner troubleshooting helps you set the asset again into manufacturing sooner.
Hold it easy, with an all-in-one answer for safe gear entry
Summing up, Cisco SEA offers you a single interface to guard your ICS and OT belongings with ZTNA. Require all distant customers to authenticate by means of a single level. Management which belongings they will entry and at what occasions. And do what a video digicam does by monitoring all distant session actions and recording knowledge for safety audits.
Be taught extra about Cisco Safe Gear Entry right here.
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