Introduction
When geopolitical tensions rise, critical infrastructure becomes an obvious target. As key nodes in global trade, ports handle the flow of goods that economies depend on. A successful cyberattack does not just disrupt operations at a single facility; it can delay imports and exports across interconnected supply chains, trigger economic losses, and erode the confidence of shipping partners. For operators responsible for keeping these systems running, strengthening OT cybersecurity posture is no longer a future consideration.
The progressive convergence of OT and IT in maritime environments has expanded the attack surface considerably. Port operations now rely on networked systems for navigation alerts, cargo management, ballast water control, CCTV surveillance, and access control — each representing a potential entry point. On vessels themselves, IoT-connected systems introduce further exposure: a compromised navigation system can cause collisions or groundings; disrupted communications can leave crews without the ability to call for help. Recent incidents have demonstrated that maritime entities face a difficult choice when hit with ransomware specifically because the cost of downtime in port operations is often more prohibitive than paying the ransom.
Prevention is the more defensible position. Establishing a robust cybersecurity framework grounded in zero trust principles and proactive threat management is the most practical response available to port operators today.
Global Regulatory Initiatives: Enhancing Port Cybersecurity
The International Maritime Organization (IMO), a specialized agency of the United Nations, plays a pivotal role in formulating and maintaining international maritime safety and environmental standards. Its primary objective is to ensure safe, reliable, and sustainable transportation, manifested through key international conventions such as the International Convention for the Safety of Life at Sea (SOLAS) and the International Convention for the Prevention of Pollution from Ships (MARPOL).
Recently, the United States Coast Guard issued a final rule detailing cyber standards for U.S. ports, which took effect in July 2025. The rule was a direct response to a pattern of cyberattacks on port systems and signals growing regulatory recognition that the maritime sector has been under-protected against the current threat landscape. Port operators subject to U.S. jurisdiction should review the USCG’s published guidance directly for compliance requirements.
The Next Step: Cybersecurity Concerns in the IMO ISPS Code
The evolution of maritime safety regulations under SOLAS and the International Safety Management (ISM) Code has predominantly focused on physical safety measures. While effective in their domain, these regulations reveal a noticeable inadequacy when confronting cybersecurity threats. The ISM Code, despite its comprehensive risk management framework, applies solely to ships — leaving port facilities under-addressed in terms of cybersecurity.
The ISPS Code, part of the SOLAS framework, stands as a comprehensive, mandatory security rubric for international shipping and port operations. Instituted in response to the September 11, 2001 tragedy, it aims to standardize risk assessment frameworks, ensuring governments implement proportionate security measures. The code is divided into two parts: Part A, which mandates detailed security-related requirements for ports and terminals, and Part B, providing recommendatory guidelines to fulfill these requirements.
At the core of the ISPS Code is the ship/port interface — the interactions that occur when a ship’s operations directly and immediately involve the movement of persons and goods, as well as the provision of port services. To comply with ISPS standards, authorities must conduct Port Facility Security Assessments (PFSA) and formulate plans, appointing Port Facility Security Officers (PFSO) and investing in necessary security equipment.
Port operators looking for a community-based approach to threat intelligence and information sharing can also engage with the MTS-ISAC, which brings together public and private maritime sector stakeholders to share threat data and coordinate response across IT and OT environments.
Embracing NIST 2.0 for Modern Ports
The National Institute of Standards and Technology (NIST) in the United States has developed a framework designed to reduce cyber risks to critical infrastructure. It focuses on six distinct functions to enhance cyber resilience: governance, identification, protection, detection, response, and recovery. Below, we provide some specific operations to explain how these can be applied to your organization and port community within an Operational Technology (OT) environment using the NIST CSF 2.0.
Governance in Cyber Risk Management
In the maritime sector, effective cyber risk management necessitates periodic assessments of OT/Industrial Control Systems (ICS) assets. This comprehensive approach includes identifying interdependencies between applications and IT/OT assets, integrating risks from third-party OT/ICS contracts, and considering regulatory changes to maintain critical process integrity.
Utilizing the TXOne Networks Portable Inspector, port operators can perform detailed vulnerability assessments across various operating systems. This tool helps with identifying vulnerabilities, conducting malware scanning, and enhancing risk management capabilities.
Identification: Laying the Cybersecurity Foundation
The identification function is crucial in establishing or advancing an organization’s cybersecurity strategy. It encompasses understanding the business context, inventorying assets, mitigating known vulnerabilities, and prioritizing cybersecurity measures. Automated solutions for asset inventory collection are vital at this stage.
Edge solutions play a pivotal role in passive asset identification, thereby enhancing visibility within OT networks. This passive monitoring bolsters network security and helps in maintaining an up-to-date asset inventory, crucial for identifying and mitigating shadow IT/OT issues.
In addition, the Portable Inspector collects asset information to generate an inventory list that grants IT/OT visibility and eliminates Shadow IT/OT.
Protection: Safeguarding Maritime Assets
Protection is key in managing defensive services, including firewalls and endpoint protection, and in overseeing vulnerability management. Continuous staff training across IT, OT, and support departments is vital for adapting to cybersecurity’s evolving nature. Rigorous control of OT network access and stringent policies prevent unauthorized connections to IT and OT assets.
EdgeFire/EdgeIPS, designed for OT environments, offers network segmentation and advanced access control. Stellar, an endpoint protection solution, prevents unauthorized application execution, reinforcing system security.
Detection: Unveiling Hidden Threats
Detection has become increasingly important, even with protective measures in place. Recognizing abnormal behavior in IT and OT systems is essential to identifying potential threats. Maintaining records of TTPs and having systems to identify primary threats are necessary for effective detection.
Stellar’s operations behavior anomaly detection catches deviations in system operations, providing real-time alerts and enhancing the ability to respond to OT threats.
Response and Recovery: Ensuring Continuity
The final functions of the NIST Framework, response, and recovery are integral to boosting resilience against cyber threats. Effective incident response planning and training minimize breach duration and prevent reputational damage. Establishing methods for vulnerability reporting and maintaining recovery plans for business-critical assets are essential.
EdgeFire/EdgeIPS ensures secure interaction with OT/ICS assets, effectively mitigating unauthorized access risks. Stellar’s anomaly detection aids in early identification and response to operational deviations. TXOne’s solutions ensure that only trusted sources can interact with OT/ICS systems, effectively limiting the scope of damage and controlling the risk of unauthorized access or vulnerabilities.
Conclusion
The stakes are not abstract: disruptions to port operations ripple into fuel supplies, food shipments, and the goods that supply chains depend on. Operators are protecting more than their own systems—they’re protecting their nation’s critical infrastructure. The framework for proactive OT cybersecurity exists: assess assets, segment networks, protect endpoints, monitor for anomalies, and have a tested incident response plan. Focusing first on visibility into OT assets and establishing basic network segmentation provides a foundation from which all other controls can be built.
Note: This article is an updated and condensed version of our 2024 piece on port cybersecurity, revised to reflect the current geopolitical context and recent regulatory developments.
