--- title: "OT Control | Govern industrial network connections | Firevault" url: https://fire-vault.com/ot-control description: "Assess engineering access and IT/OT crossings around process safety, local operation and approved maintenance, with scoped physical connection control." lang: en-GB --- Control by Firevault (https://fire-vault.com/control) / OT Control # OT Control. Keep engineering access deliberate. Industrial systems need dependable communications, often across long equipment lifecycles. Physical connection control starts with the process, its dependencies and the engineering work that actually requires access. Discuss your Control requirements: https://fire-vault.com/contact?subject=control See where Control applies Can engineering access close without interrupting the process? Incident Path exposed Outcome Control taken Approximately 120–150 ms Management enable/disable operation Around 2–3 seconds SMS round-trip operation, good signal March 2025 test observations, not guaranteed timings. Why connection control matters ## A connection change is a service decision. Loss of telemetry, engineering access or shared services may affect production, monitoring or recovery. Process control and safety communications must never be assumed safe to interrupt. Remote support and IT/OT crossings can extend business-network exposure into an industrial environment. Legacy equipment may have limited protection of its own, but cutting its communications can carry operational consequences. Reported incidents in related sectors ### South Staffs Water 2022 Sector Water What was reported Attackers were inside the network for nearly two years before they were found. Drinking water stayed safe, but customer data was published and the ICO later fined the company. Customer data: https://fire-vault.com/control-blueprint/utilities-water Bitdefender, reporting the ICO: https://www.bitdefender.com/en-au/blog/hotforsecurity/uk-water-1-million-hackers-ransomware ### Ukrainian distribution companies 2015 Sector Energy What was reported Attackers used remote access to open substation breakers, cutting power to around 230,000 customers for several hours. Grid operations: https://fire-vault.com/control-blueprint/energy Wikipedia summary of public reporting: https://en.wikipedia.org/wiki/2015_Ukraine_power_grid_hack ### Colonial Pipeline 2021 Sector Oil & Gas What was reported Ransomware hit business systems and the operator shut the pipeline down as a precaution, disrupting fuel supply across the US East Coast. Precautionary shutdown: https://fire-vault.com/control-blueprint/oil-and-gas Wikipedia summary of public reporting: https://en.wikipedia.org/wiki/Colonial_Pipeline_ransomware_attack These incidents show how a connection path can shape what happens next. They are not claims about what any single control would have prevented. What Control changes ## Three things you can control physically. Control complements your network security, detection, identity management and incident response. It does not replace them. **It gives their decisions a physical place to act, on the connections you select.** Control access ### Govern when selected connections may exist. Supplier, engineering and partner routes are connected for approved work, to named systems, for a set window, and disconnected afterwards. Not open by default. Control Plans Control third-party connections: https://fire-vault.com/control-module/relay Control connections in two approved stages: https://fire-vault.com/control-module/unlink Control exposure ### Reduce unnecessary standing paths into critical systems. Each critical system keeps the connections it genuinely needs, inside a defined physical boundary. Paths it does not need are disconnected. Control Plans Enforce physical network boundaries: https://fire-vault.com/control-module/execute Protect critical system connections: https://fire-vault.com/control-module/validate Control intervention ### Physically disconnect selected connections under an agreed authority. When your response plan calls for it, the selected path is physically disconnected on a decision by the people or rules you agreed in advance, and stays disconnected until an authorised release. Control Plans Contain ransomware spread: https://fire-vault.com/control-module/fracture Contain a live incident: https://fire-vault.com/control-module/isolate Authorise emergency disconnection: https://fire-vault.com/control-module/fracture#also Where Control applies & Control modules ## OT Control. The Modules that make a difference. A vendor needs a scheduled engineering connection to a supervisory zone. Operations approve the target and work window while local process and safety functions remain outside the selected intervention. Where do you need Control? **Approved engineering access** ### Control engineering access without assuming the process stops. Relay governs the selected maintenance window, Validate establishes required approval through supporting systems, and Isolate defines the assessed IT-to-OT boundary. Local operations and safety remain separately assessed. Commanded Permit the assessed engineering task after required approval. Reported by the control point Illustrative maintenance path available; separate IT-to-OT path disconnected. Independently verified Operations must validate process state, safety dependencies and actual connectivity. Explore OT Control (https://fire-vault.com/ot-control) Modules in this example **Relay**Controlled third-party and remote access: https://fire-vault.com/control-module/relay **Validate**Connection authorisation and assurance: https://fire-vault.com/control-module/validate **Isolate**Physical network segmentation: https://fire-vault.com/control-module/isolate Explore all nine Modules (https://fire-vault.com/control-modules)Explore adoption approaches (https://fire-vault.com/control-plans) Concept illustration. Commanded, reported and independently verified states are shown separately because they are not the same thing, and what can be verified depends on your deployment. Disconnecting a selected path changes what can use that path. On its own, it does not contain an incident across a whole environment, and routes outside the plan, such as wireless or cellular links, need their own controls. Control Blueprints ## Your industry’s connections, mapped and controlled. How OT Control applies in the industries where these connections matter most. Each Blueprint maps real systems, suppliers and operating constraints. Image: BP-01 Water Control Blueprint icon (https://fire-vault.com/__l5e/assets-v1/c813ccff-24b8-48e9-8cf9-37bc1872048d/BP-01_water.png) ### Water Treatment and distribution SCADA. Read the Water Blueprint (https://fire-vault.com/control-blueprint/utilities-water) Image: BP-02 Energy Control Blueprint icon (https://fire-vault.com/__l5e/assets-v1/4f1631a8-bbd0-4122-94d4-3dc5305d050b/BP-02_energy.png) ### Energy Electricity network control systems. Read the Energy Blueprint (https://fire-vault.com/control-blueprint/energy) Image: Oil & Gas Blueprint icon (https://fire-vault.com/__l5e/assets-v1/f4e534c3-a09f-4b1e-b266-7e25e6a1986e/BP-03_oil-gas.png) ### Oil & Gas DCS, SCADA and refinery control paths. Read the Oil & Gas Blueprint (https://fire-vault.com/control-blueprint/oil-and-gas) Image: BP-04 Rail Control Blueprint icon (https://fire-vault.com/__l5e/assets-v1/0f9e1bb6-2739-43eb-b117-2df5457fe7ed/BP-04_rail.png) ### Rail Train and signalling networks. Read the Rail Blueprint (https://fire-vault.com/control-blueprint/rail) See all industry Blueprints (https://fire-vault.com/control-blueprints) Fourteen Blueprints are published. Each deployment is designed around your own estate. Firevault, as featured in - Read about Firevault on TechRadar Pro: https://www.techradar.com/pro/uk-startup-put-physical-disconnect-switch-in-its-cloud-storage-offering-to-mitigate-ransomware-attacks-but-will-that-be-enough - Read about Firevault on Yahoo Finance: https://uk.finance.yahoo.com/news/firevault-launches-help-businesses-directors-074500961.html - Read about Firevault on Channel Insider: https://www.channelinsider.com/security/tools-and-platforms/firevault-security-offline-platform-offering/ - Read about Firevault on Security Buyer: https://securitybuyer.com/uk-cybersecurity-startup-launches-firevault/ - Read about Firevault on SecurityBrief: https://securitybrief.com.au/story/firevault-unveils-offline-digital-vault-to-combat-rising-cyber-risks How Control works ## Decisions made by people. Enforced physically. Your tools detect, your people and policies decide, and Control changes the connection state of the selected path. Here is what that rests on. ### Physical enforcement Control changes the connection state of a selected path at Layer 1: connected, or physically disconnected. It does not inspect or alter the traffic on it. ### An independent command path Commands reach each control point over a configured command path, kept separate from the network being controlled. How each point behaves if that path is lost is agreed and tested. ### Authorised changes Who can connect, disconnect or release each path is agreed in advance: named people, more than one approval where it matters, or rules and high-confidence alerts you set. ### Evidence, as configured Commands, approvals and reported states can be recorded for your deployment, so you can show what changed, when, and on whose authority. Before you deploy ## Physical control is an operational decision. Confirm the selected paths, supporting systems and failure behaviour in the actual environment. No generic drawing can substitute for this assessment. 1. **SCADA and supervisory systems**Review process hazards, vendor support requirements and management of change. 2. **Engineering workstations and supplier maintenance**Identify local control, interlocks and safety-related systems that must keep communicating. 3. **Industrial controllers and plant communications**Test command loss, power-loss behaviour and restoration in a safe maintenance context. 4. **Selected crossings between enterprise IT and operational zones**Agree emergency support and operational override procedures before deployment. Control governs the selected paths in your plan. It does not inspect traffic, and wireless, cellular and other routes outside the plan need their own controls. ### Straight answers No. They detect, filter and investigate. Control adds a physical way to act on the selected paths when your people, or rules you have agreed, decide to. No. It changes whether a selected path is connected. It does not read or change what travels on it. It can, which is why the dependencies, safe states and restoration steps for each path are agreed and tested with your operations and safety owners before anything goes live. It controls selected connectivity. Disconnecting a path removes the connections an AI system was using and gives people an independent way to intervene. It does not necessarily stop a model or process running locally. No. Control governs connections. Keeping data physically offline is Offline Secure Storage®, a separate Firevault product that can sit alongside Control. Yes. Start with one connection: a supplier route, an IT–OT crossing, or the path to one critical system. Your next step ## Start with one critical connection. Begin with one engineering connection. Agree its purpose, intervention authority, dependencies and the checks that make restoration acceptable. 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