Industry Insights

Compliance: Mapping the Coast Guard’s MTSA Cyber Rule to VersaONE

Here is how Versa Unified SASE platform translates 33 CFR Part 101, Subpart F into controls for compliance.

The final rule on Cybersecurity in the Marine Transportation System is a federal regulation under 33 CFR Part 101, Subpart F, with phased deadlines, mandatory reporting to the National Response Center, designated Cybersecurity Officers, annual exercises, third-party penetration testing, and — by July 16, 2027 — a Coast-Guard-approved Cybersecurity Plan that enforces segmentation between IT and OT networks.

And as Dark Reading observed, this rule is widely expected to preview mandatory frameworks coming to other critical infrastructure sectors.

For CISOs, GRC leads, and security engineers in maritime — the question is which architecture lets you implement security controls once, prove them on demand, and keep them enforced. This blog provides requirement mapping to each control with corresponding capability in the VersaONE Universal SASE platform.

1.  The Clock, in Four Marks

Implementation timeline under 33 CFR Part 101, Subpart F

Before mapping controls, following are the deadlines

JUL 16 • 2025	Rule effective. Reportable cyber incidents must be reported to the National Response Center without delay.
JAN 12 • 2026	All personnel must complete the cybersecurity training specified in 33 CFR 101.650(d), and annually thereafter.
JUL 16 • 2027	Designate a Cybersecurity Officer (CySO), complete the initial Cybersecurity Assessment, and submit the Cybersecurity Plan for Coast Guard approval. Network segmentation must be in place.
ANNUAL	Annual cybersecurity assessments, two cybersecurity drills every 12 months, and Cybersecurity Plan validation through reviews of incident response cases.

2.  Why the Architecture Matters Before the Controls

VersaONE is a unified SASE platform with a single console, unified policy model, and a single data lake spanning SD-WAN, SD-LAN, SSE, NGFW, ZTNA, CASB, SWG, DLP, and microsegmentation. For an MTSA-regulated operator, this consolidation act as an audit posture: one set of policies, one set of logs, one place to demonstrate enforcement.

The mapping that follows is organized around the technical requirements in 33 CFR 101.650 — account security, device security, data security, training, risk management, supply chain, resilience, network segmentation, reporting, and physical security.

3.  Requirement-by-Requirement Mapping

Each table below states the MTSA requirement on the left, and the corresponding VersaONE capability on the right. CFR citations reference 33 CFR 101.650 unless otherwise noted.

3.1  Account Security

§ 101.650(a)   Account Security Measures

MTSA REQUIREMENT	VERSAONE CAPABILITY
MFA required on password-protected IT systems and remotely accessible OT systems.	Versa Secure Private Access (ZTNA) enforces MFA at the SASE gateway before any session reaches an IT or OT application, including for third-party contractors and vendors. Device posture is checked continuously, not just at login.
Principle of least privilege; privileged user accounts segregated and monitored.	Versa policy is identity-, device-, and application-aware. Privileged sessions can be routed through dedicated tenants, recorded by session, and inspected inline by the integrated NGFW — with all events landing in the Versa unified data lake.

3.2  Device Security

§ 101.650(b)   Device Security Measures

MTSA REQUIREMENT	VERSAONE CAPABILITY
Maintain a current network map and inventory of IT and OT systems, including OT device configuration information, available to the Coast Guard upon request.	Versa’s deep packet inspection (DPI) engine performs first-packet identification of industrial protocols (Modbus, MQTT, CoAP, and more), and the device-fingerprinting engine identifies over a million device types. The result is a continuously updated asset map exportable for the Cybersecurity Plan and for COTP review.
Disable or remove unauthorized software, applications, and services from IT and OT systems.	Versa CASB and SWG enforce sanctioned-application policy across user traffic; Versa NGFW with application identification blocks unauthorized protocols at the LAN, WAN, and cloud edges.
Block, disable, or remove unused physical access ports; grant by-exception only.	Versa Secure SD-LAN extends Zero Trust and microsegmentation into Ethernet switch ports, allowing port-level policy that denies by default, fingerprints any device that connects, and quarantines unknown devices into an isolated segment.

3.3  Data Security & Logging

§ 101.650(c)   Data Security & Logging

MTSA REQUIREMENT	VERSAONE CAPABILITY
Maintain logs of security-relevant events from IT and OT systems sufficient to detect, investigate, and respond to cyber incidents.	The Versa unified data lake aggregates network, security, identity, and device telemetry from every Versa enforcement point into a single store, supporting investigation, retention, and Coast Guard inspection without stitching together SIEM feeds from disparate tools.
Encrypt data in transit, including across IT/OT boundaries and over public networks.	SASE tunnels between Versa enforcement points use IPsec/TLS by default; Versa SD-WAN supports AES-256 for inter-site traffic. ZTNA enforces TLS for application access from any device, anywhere.
Protect sensitive operational and personnel data from unauthorized disclosure.	Versa DLP inspects traffic inline at the SASE gateway for sensitive data patterns (PII, credentials, financial data, custom maritime classifications such as Sensitive Security Information) and applies block, alert, or allow actions — with single policy across web, SaaS, private apps, and email.

3.5  Risk Management, KEVs, and Penetration Testing

§ 101.650(e)   Cybersecurity Assessment & Vulnerability Management

MTSA REQUIREMENT	VERSAONE CAPABILITY
Annual cybersecurity assessment identifying all IT and OT systems that could lead to a Transportation Security Incident (TSI).	Versa’s continuous device discovery, fingerprinting, and behavioral baselining produce the asset and flow inventory that feeds the assessment — not a once-a-year scan, but a live map that the CISO can attest to.
Penetration testing in conjunction with Cybersecurity Plan renewal; results retained in the FSA/VSA/OCS FSA.	Versa’s unified policy and centralized logging give pen-test teams a clean inventory of enforcement points and an auditable record of policy versions — making test scoping and remediation tracking materially less painful than in fragmented stacks.

3.7  Resilience and Incident Response

§ 101.650(f) & (g)   Reportable Incidents, Backups, and Cyber Incident Response

MTSA REQUIREMENT	VERSAONE CAPABILITY
Develop, implement, maintain, and exercise a Cyber Incident Response Plan.	Versa’s unified data lake and analytics provide the inputs CSIRPs depend on: anomaly detection, behavioral baselining, and AI/ML-driven threat scoring, surfaced through one console rather than reconciled across point tools.

3.8  Network Segmentation

A 2025 Cisco survey cited in Dark Reading found that 94% of organizations encountered problems with segmentation due to environmental complexity, lack of visibility, and difficulty identifying legitimate information flows.

§ 101.650(h)   Network Segmentation

MTSA REQUIREMENT	VERSAONE CAPABILITY
Implement segmentation between IT and OT networks.	Versa NGFW deployed inline between IT and OT — via cloud gateway, branch CSG appliance, or virtualized at the edge — enforces policy with OT-aware DPI (Modbus, MQTT, CoAP, and other industrial protocols). Policy is identity-, device-, and application-aware, not just port- and IP-based, which is the failure mode of legacy VLAN segmentation.
Segment networks by function and trust level (e.g., a Purdue-style zoning model in OT environments).	Versa adaptive microsegmentation creates dynamic segments based on device profile, posture, user identity, and behavior — mappable to Purdue Levels 0–3 and IEC 62443 zones-and-conduits. Headless OT and IoT devices are auto-fingerprinted and placed into the correct microsegment without an agent.
Restrict communications between segments to only what is necessary for operations.	Versa policy defaults to deny; allowed flows are explicit, identity-aware, and continuously inspected. East-west traffic inside a segment can be inspected by the same NGFW stack as north-south traffic, eliminating the segmentation blind spots VLAN-only designs leave behind.
Maintain segmentation as the environment changes (new devices, vendor access, cloud integrations).	Because Versa runs on a single OS with one policy plane across WAN, LAN, cloud, and remote, segmentation policy is enforced consistently regardless of where the workload or device sits. New devices are fingerprinted and segmented automatically; new sites inherit policy via Concerto orchestration.

Key Takeaway:

Leverage the blog to do the mapping of MTSA requirements to Unified VersaOne platform to gain continuous compliance, cover security gaps, and enhance security posture.