Executive Summary
- The Challenge: A major international airport needed to secure its evolving operational technology (OT) environment, including legacy systems and architecture, without disrupting 24/7 terminal operations.
- The Solution: solutions4networks designed and deployed a defense-in-depth strategy featuring passive monitoring to eliminate security blind spots and segment critical systems.
- The Outcome: The airport achieved complete asset visibility, reduced its cyber risk exposure, and established a secure, scalable foundation aligned with industry standards for future terminal expansion.
Airport OT Cybersecurity: Modernizing in a 24/7 Environment
As part of a major terminal modernization initiative, a major international airport engaged solutions4networks to strengthen the cybersecurity and resilience of its existing combined Enterprise and Operational Technology (OT) environment.
Like many transportation facilities, the airport operates in a high-stakes, 24/7 environment where downtime is not an option. Over time, their critical infrastructure had evolved through multiple vendors and operational teams, encompassing a wide range of essential services:
- Baggage handling systems
- Video Surveillance Systems (VSS)
- Access Control and Alarm Monitoring System (ACAMS)
- Building Management Systems (BMS)
- Parking and access control
- Supporting terminal utilities
This complex infrastructure relied on a mix of Programmable Logic Controllers (PLCs), Supervisory Control and Data Acquisition (SCADA) systems, Human-Machine Interfaces (HMIs), and industrial networks. While these systems successfully supported the facilities, engineering, and operations teams, their organic growth had introduced structural vulnerabilities.
Limited asset visibility, legacy hardware, and converged IT/OT network architecture created growing OT cybersecurity risks. Faced with increased regulatory compliance scrutiny and an expanding terminal footprint, the airport required a definitive strategy: improve OT visibility, drastically reduce cyber exposure, and guarantee operational continuity without disrupting critical passenger services.
Project Drivers: Identifying Critical OT Vulnerabilities
Following a detailed assessment of the airport’s operational environment, solutions4networks identified several interconnected cybersecurity and operational challenges that required immediate remediation:
- Lack of Centralized OT Asset Visibility: Critical systems supporting daily airport operations were neither centrally inventoried nor monitored. This blind spot made it difficult to accurately map system dependencies, assess true risk levels, or respond effectively to potential incidents.
- The Risk of Combined Network Architecture: Because OT systems were operating on largely shared network segments, the environment was highly vulnerable. In the event of a compromise, this VLAN Segmented Network architecture significantly increased the potential for lateral movement across the airport’s critical infrastructure.
- Unsecured Third-Party Vendor Access: External vendors maintaining essential services—such as baggage handling and building management—relied on remote desktop connections via jump servers. These connections lacked sufficient logging and access controls, introducing severe operational and security liabilities.
- Escalating Regulatory Pressures: As transportation infrastructure becomes a primary target for cyber threats, the regulatory expectations and public safety mandates governing operational technology environments continue to evolve rapidly.
- The Threat of Operational Disruption: In an aviation environment, any cyber incident compromising OT systems carries an immediate, high-impact risk: disrupting passenger flow, delaying flights, and jeopardizing both public safety and passenger trust.
Together, these vulnerabilities created an urgent mandate: modernize the airport’s OT cybersecurity posture decisively, while guaranteeing zero interruption to active terminal operations.
Want to dive deeper into identifying and managing operational risks? Watch our on-demand webinar on OT Vulnerability Management to learn how to eliminate security blind spots in critical infrastructure.
Developing a Defense-in-Depth Airport OT Cybersecurity Strategy
To directly address these operational risks, solutions4networks engineered a defense-in-depth strategy focused on three core objectives: improving OT visibility, strengthening monitoring capabilities, and architecting a highly resilient, segmented network.
To address the airport’s operational and cybersecurity risks without compromising terminal availability, solutions4networks developed a defense-in-depth strategy built around visibility, segmentation, controlled access, and continuous monitoring. The objective was to reduce exposure across the environment while preserving the uninterrupted communication and functionality these systems require every day.
The strategy established several interconnected layers of protection:
- Complete OT Asset Visibility: The first priority was identifying the operational technology assets connected across the airport environment and understanding how those systems communicated. This created the foundation for more accurate risk assessment, incident response, asset management, and future security planning.
- Segmentation Between Critical Systems: The architecture was designed to reduce the potential for lateral movement by creating stronger boundaries between enterprise IT and operational technology networks, as well as between critical OT functions. This approach helped contain potential threats and limited the impact a compromise in one area could have on other airport systems.
- Improved Monitoring and Threat Detection: Passive OT monitoring was introduced to provide continuous insight into asset behavior and network communications without interfering with active airport operations. This allowed the airport to identify abnormal activity, detect potential threats earlier, and eliminate security blind spots across previously difficult-to-monitor systems.
- More Controlled Third-Party Access: Because external vendors support essential airport systems, the strategy also addressed the risks associated with remote access. Strengthening oversight, logging, and control of vendor connections helped the airport maintain the support required for critical systems while reducing unnecessary exposure to its operational environment.
- A Scalable, Standards-Aligned Security Foundation: The resulting architecture was designed around recognized OT cybersecurity practices, including NIST and IEC 62443 principles. This gave the airport a more resilient framework for managing current risks while supporting future terminal expansion, new technologies, and evolving regulatory expectations.
Executing a Zero-Downtime Solution Implementation
solutions4networks translated this strategy into a robust OT cybersecurity architecture aligned with stringent transportation security requirements. To guarantee operational continuity, the implementation followed a carefully coordinated, four-step process:
1. Discover & Assess the Airport’s OT Environment
The team conducted rigorous on-site assessments to comprehensively identify OT assets and map communication flows across critical systems, including baggage handling, Video Surveillance Systems (VSS), and access control. By collaborating directly with internal teams and external vendors, solutions4networks validated exact system interactions and documented functional dependencies.
2. Design a Standards-Based Architecture
Leveraging industry best practices, the team developed an airport-specific architecture aligned with NIST and IEC 62443 standards. This design introduced critical network segmentation between IT and OT systems, establishing a scalable, secure foundation for future terminal expansion.
3. Implement Through Coordinated Phased Deployment
To ensure continuous operations across critical infrastructure, solutions4networks deployed segmentation controls and Cisco Cyber Vision in carefully planned phases. These deployments were strictly aligned with established maintenance windows to protect baggage handling, surveillance, and access management workflows.
4. Validate, Test, and Enable Operations
Prior to full enablement, the team executed validation testing alongside third-party vendors, activated monitoring and alerting capabilities, and established robust rollback procedures to guarantee system stability. Close coordination with IT security, facilities, and operations ensured every change was executed safely, without a single disruption to flight operations.
This layered approach improved visibility, reduced risk exposure, and created a sustainable cybersecurity foundation for future airport expansion.
Solution Spotlight: Cisco Cyber Vision
A cornerstone of this strategy was the deployment of Cisco Cyber Vision, an industrial cybersecurity monitoring platform engineered specifically for complex operational technology environments. By utilizing the platform’s passive monitoring capabilities across industrial networks, the airport could accurately identify assets, map complex communication patterns, and detect abnormal or potentially malicious activity—all without risking disruption to active terminal operations.
This introduction of OT-specific monitoring successfully bridged the gap between IT and OT teams, integrating visibility with existing IT security operations and systematically eliminating critical security blind spots.
Impact & Outcomes: Building Cyber Resilience for Aviation
The OT cybersecurity modernization initiative delivered immediate improvements in both operational visibility and long-term cyber resilience. By executing this project seamlessly alongside daily airport operations, solutions4networks achieved the following key outcomes:
- Comprehensive OT Asset Visibility: Refined the tracking and visibility of the critical operational technology assets that keep the airport running safely.
- Mitigated Cyber Risk Exposure: Drastically reduced the risk of lateral movement across the airport’s most critical operational networks.
- Proactive Threat Detection: Enhanced the airport’s ability to quickly detect abnormal OT activity and potential security threats.
- Unified Security Operations: Bridged the gap between departments, fostering improved collaboration across IT security, facilities, and airport operations teams.
- Streamlined Asset Management: Revised and simplified the management of complex OT environments through continuous, passive monitoring.
- Secured Third-Party Access: Upgraded the control and operational oversight of vendor remote access to critical infrastructure systems.
- Verified Standards Compliance: Confirmed strict alignment with rigorous industry cybersecurity frameworks, specifically IEC 62443.
By successfully implementing a defense-in-depth architecture and introducing OT-specific monitoring capabilities, the airport established a robust, scalable cybersecurity posture. Most importantly, this modernization was achieved while fully maintaining the continuous, 24/7 operations required for passenger safety, flight continuity, and overall airport reliability.
Ready to modernize and protect your critical infrastructure? Explore our comprehensive Cyber Security Solutions to see how solutions4networks can safeguard your operational environment without disrupting daily operations.
