Analyst’s View: Secure Remote Access for OT/ICS

The increasing intersection of IT and OT in industrial operations has heightened the need for secure connectivity, as traditional remote access tools such as VPNs fall short in providing necessary control and security. Secure Remote Access (SRA) solutions tailored for Operational Technology (OT) and Industrial Control Systems (ICS) address these challenges by implementing fine-grained access policies, ensuring system and data integrity through capabilities like encryption, audit trails, and multifactor authentication. SRA solutions particularly enhance the security of legacy OT and ICS systems, which often lack inherent protection, reducing risks of unauthorized access or cyberattacks. These systems operate within higher Purdue Model levels, mediating access to critical field devices while aligning with industry regulations like IEC 62443 and NERC CIP. As industrial sectors embrace remote management and cloud solutions, the demand for SRA evolves. The focus shifts towards reducing vulnerabilities through Zero Trust principles, broader regulation-driven adoption, and integration with security management tools. Vendors are innovating to support diverse IT/OT systems and maintain uptime, emphasizing features like failover and session persistence. The SRA market expands alongside digital transformation, with vendors developing features like real-time risk scoring, protocol isolation, and application-level access segmentation to protect unpatchable systems. Overall, SRA serves as a strategic necessity for industrial organizations to meet both resilience and compliance requirements, safeguarding remote connectivity across critical systems.

• Traditional VPNs lack session-specific restrictions and offer broad access.
• SRA enforces encrypted sessions, recording, and multifactor authentication.
• Many OT and ICS devices lack native security features.
• SRA solutions align with standards such as IEC 62443 and NERC CIP.
• Industrial sectors like energy, manufacturing, and transportation are adopting SRA.
• The SRA market is transitioning from specialized to core requirement status.
• Zero Trust architectures in SRA segment access at the protocol or application level.
• SRA integrates with Privileged Access Management and Identity Governance tools.
• High availability and failover capabilities are critical for SRA platforms.
• Market growth is influenced by the convergence of IT and OT security operations.

• "SRA has evolved from a convenience tool into a central element of industrial cybersecurity."
• "The ability to maintain uptime remains paramount."
• "SRA platforms mitigate risks by enforcing Zero Trust principles."
• "Traditional remote access tools…grant broad access and lack session-specific restrictions."
• "Vendors are increasingly integrating SRA with security tools such as Privileged Access Management."
• "Organizations that deploy SRA achieve both security and efficiency."
• "The SRA market…is a core requirement across industrial sectors."
• "Future developments will likely emphasize enhanced behavioral analytics."
• "SRA enables controlled connectivity across complex environments."
• "Policy-based and attribute-based controls restrict access to specific systems."