Manufacturing Archives

10/05/2026

Data diode vs firewall in OT: when filtering is not enough

data diode vs firewall: practical guidance for secure one-way data flow architectures.

Summary: Firewalls are essential but bidirectional by nature at the enforcement plane. This article contrasts firewall-centric designs with hardware-enforced one-way links for OT monitoring and explains where each belongs.

The bidirectional reality of firewalls

Stateful inspection depends on seeing flows and maintaining session context. Operators continuously tune rules, patches, and vendor behaviour. That is acceptable for many enterprise boundaries—but in OT, reverse-path risk (management plane exposure, latent CVEs, misconfiguration under pressure) can be unacceptable for certain zones.

What a data diode changes

A diode constrains the discussion from “what packets might return?” to “no physical return path exists for exploit-bearing traffic.” Monitoring and file extraction can still occur outbound, while inbound remote-control surfaces are structurally removed.

Practical comparison framework

Use firewalls where bilateral communications are genuinely required and compensating controls are mature.
Add hardware-enforced one-way segments where monitoring must leave the plant but inbound paths must remain categorically blocked.

Official Connexite comparison document

Download the concise comparison brief:

Data diode vs firewall (PDF)

For model selection context, see also the ConnexONE datasheet (PDF).

Deep Dive Guides, OT / ICS, Protocol Guides

energy distribution telemetry data diode featured image

10/05/2026

Energy sector telemetry: designing one-way paths from substations and remote sites

energy sector telemetry paths substations: practical guidance for secure one-way data flow architectures.

Summary: Remote generation, transmission, and distribution assets produce enormous operational data. This article outlines architecture considerations for moving telemetry out of operational zones without opening interactive remote paths.

Operational constraints

Energy operators often standardise on redundant communications and strict change control. Introducing non-interactive, outbound-only monitoring preserves separation between real-time control and enterprise analytics.

Patterns that work well

Historian and event feeds replicated one-way to an enterprise lake.
File-based exports of curated operational KPIs where streaming is not required.
Segmentation between vendor maintenance laptops and production VLANs—pair procedural controls with hardware directionality where risk warrants it.

Connexite resources

Start from the general diode guide, then map throughput needs to the ConnexONE family overview:

Guide to Data Diodes (PDF)
ConnexONE family datasheet (PDF)

Deep Dive Guides, Energy, Vertical Solutions

10/05/2026

Choosing a ConnexONE throughput tier: Nova 1G and the family line-up

connexone throughput tier nova 1g: practical guidance for secure one-way data flow architectures.

Summary: Throughput, interface, and failure behaviour drive diode selection. Use Connexite’s published datasheets as the authoritative numbers for procurement and design reviews.

What to decide first

Peak and sustained throughput required by your aggregation architecture.
Physical interfaces available in your racks or enclosures.
Operational monitoring expectations—how operators verify health without violating one-way guarantees.

Nova 1G positioning

The Nova 1G product page and datasheet articulate where this variant sits within the ConnexONE range for environments that require multi-gigabit-class outbound capacity—confirm exact port maps and environmental ratings in the PDF.

Downloads

ConnexONE datasheet PDF (verify Nova 1G section)
ConnexONE family datasheet (PDF)
ConnexONE one-pager (PDF)

Datasheet, Deep Dive Guides, Products

10/05/2026

Network data diodes explained for engineers and architects

network data diode: practical guidance for secure one-way data flow architectures.

Summary: This article introduces how hardware-enforced, one-way data paths differ from general network controls, and when they belong in an architecture review. For full technical depth, use Connexite’s official guide (PDF) linked below.

Why one-way hardware matters

In operational technology (OT) and high-assurance IT, the recurring requirement is simple to state and difficult to implement in software alone: data may leave a sensitive enclave for monitoring or aggregation, but nothing may return as a control plane or reverse channel that could be abused. A network data diode implements that guarantee at the physical layer of the link, rather than as a policy rule on a bidirectional device.

Where teams deploy diodes

Typical patterns include:

Telemetry uplift — SCADA/historian data to enterprise lakes without exposing plant interfaces.
Cross-domain handoff — moving events or files from a classified or regulated segment to an operational analytics tier.
Vendor or remote access isolation — ensuring maintenance paths cannot become inbound command paths.

How this relates to ConnexONE

ConnexONE Data Diodes are positioned as guaranteed one-way paths with product variants aimed at different throughput and form-factor constraints. Before shortlisting a model, align throughput, interface type, and failure modes with your network design—the family datasheet summarises the range.

Download the official technical guide

For diagrams, terminology, and deployment considerations straight from the ConnexONE documentation set, download:

Guide to Data Diodes (PDF)

Editorial note

Specifications and certifications evolve—validate any compliance claims for your sector with Connexite before relying on them in procurement or authority submissions.

Data Diode, Deep Dive Guides, OT / ICS

20/05/2025

CIS Controls Compliance- Vertical Solutions

VERTICAL SOLUTIONS

CIS CONTROLS COMPLIANCE

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Center for Internet Security developed the CIS Controls v8.1 for ICS—a specialized framework designed to help cybersecurity posture using practical, prioritized defensive measures

The CIS Controls for Industrial Control Systems (ICS) is a globally recognized cybersecurity framework developed by the Center for Internet Security. It provides a prioritized set of defensive actions specifically tailored for operational technology (OT) environments, guiding asset owners in securing critical infrastructure like manufacturing plants, power grids, water treatment facilities, and more. The v8.1 ICS edition maps these actions to the unique risks and constraints of ICS, including real-time system requirements, legacy components, and safety-critical operations.

ICS environments face increasingly frequent and sophisticated cyber threats—from ransomware that halts production to state-sponsored attacks targeting energy systems. The CIS Controls v8.1 provides a practical, tested roadmap for resilience, covering everything from asset inventory and configuration management to secure data flow and audit logging.

ConnexOne, our high-assurance, hardware-enforced unidirectional gateway, plays a pivotal role in achieving the goals laid out in the CIS Controls v8.1 ICS guide. While many safeguards rely on policies or software enforcement, ConnexOne offers physically enforced data integrity by ensuring that information flows only one way—from ICS to enterprise, never back. This unidirectional flow is vital in scenarios where confidentiality, system integrity, and availability are non-negotiable.

Resources, Vertical Solutions

12/05/2025

File Transfer – Protocol Guide

PROTOCOL GUIDE

File Transfer

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Wide protocol support for file transfer from simple SMB to Amazon S3

File transfer between strictly different security zones is crucial for maintaining data integrity and security. It ensures that sensitive information is securely transmitted without exposing critical systems to potential threats. One-way communication, facilitated by data diodes, significantly enhances security by allowing data to flow only from a secure zone to a less secure zone. This unidirectional flow prevents any return path for potential cyber-attacks, ensuring that sensitive networks remain isolated and protected. By using one-way communication, organizations can safely transfer necessary data while mitigating the risk of unauthorized access and maintaining robust cybersecurity protocols.

ConnexOne DNA of one-way protocol transfer comes from its ancestors, deployed only where file transfer was enough. It creates a delivery environment of secure, fast and reliable, but also comply with business flows by adding more security precautions such as data masking, metadata cleaning and external tool integrations.

ConnexOne also allows hierarchical permissions to be applied for any file transfer, matching with corporate security policies, that may be forced by law, or defense industry regulations

Protocol Guides

12/05/2025

27001 Compliance- Vertical Solutions

VERTICAL SOLUTIONS

27001 COMPLIANCE

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Data diodes are critical for ISO 27001 compliance, providing unidirectional data flow to prevent unauthorized access and data exfiltration.

ISO/IEC 27001 is a globally recognized standard for managing information security, aimed at helping organizations protect their information assets such as financial data, intellectual property, and personal information.

It specifies requirements for establishing, implementing, maintaining, and continuously improving an Information Security Management System (ISMS), emphasizing risk management and continual improvement.

Key components of ISO 27001 include a systematic approach to managing sensitive information, identifying and treating risks, and implementing specific security controls. The standard is used across various industries to ensure compliance with legal and regulatory requirements, enhance customer trust, and provide a competitive advantage. It also supports operational efficiency, business continuity, and third-party assurance.

Data diodes are critical for ISO 27001 compliance, providing unidirectional data flow to prevent unauthorized access and data exfiltration. By enforcing strict network segmentation, data diodes isolate sensitive information, ensuring robust access control and secure communication channels. This hardware-enforced security mechanism protects against sophisticated cyber threats and ensures the integrity and confidentiality of critical data.

Resources, Vertical Solutions