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Zero Belief Community Entry (ZTNA) is a safe distant entry service. It verifies distant customers and grants them entry to the best assets on the proper instances based mostly on id and context insurance policies. That is half 3 in our weblog sequence about ZTNA for operational expertise (OT). Take a look at Half 1 for why ZTNA beats out always-on VPNs for OT distant entry and Half 2 for a 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 if you happen to 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 might help pinpoint what went flawed.
Monitoring and recording actions are equally important relating to distant customers accessing your OT networks. It’s not sufficient to confirm the id of distant workers, distributors, and contractors. Neither is it sufficient to know who’s linked to what OT/ICS property. You additionally have to know what customers are doing throughout distant entry periods. Most organizations lack that visibility at present, a shortcoming for cybersecurity compliance, governance, the flexibility to cease and get well from breaches, and incident investigation.
Conveniently, Cisco Safe Tools Entry (SEA) provides 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 make the most of 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 ‘Consumer 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 if you happen to see one thing suspicious, like an try to alter the code or a variable in a programmable logic controller (PLC), you may terminate the session with a click on and disconnect the distant person. Distant session termination is required by ISA/IEC62443-3-3 FR2.
2 – Keep a whole 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 important infrastructure and OT safety requirements akin to ISA/IEC62443-3-3 require data 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, machine posture, and session actions. Or see who added new customers or new property to the system.
3 – Document periods to see what occurred
Optionally document periods for chosen property, just by choosing 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.
Preserve it easy, with an all-in-one answer for safe gear entry
Summing up, Cisco SEA provides you a single interface to guard your ICS and OT property with ZTNA. Require all distant customers to authenticate by means of a single level. Management which property they’ll entry and at what instances. And do what a video digital camera does by monitoring all distant session actions and recording knowledge for safety audits.
Study extra about Cisco Safe Tools Entry right here.
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