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OT Data Diode
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AhnLab Data Diode

One-Way Communication for Rock-Solid Protection

Read BrochureContact SalesWeb Page: Frost Radar 2025

AhnLab Data Diode strengthens OT network air-gapping by delivering unidirectional data transfer that forces one-way communication from the OT to the IT network.

Why AhnLab Data Diode

Simple Yet Powerful OT Protection

Powerful Segmentation

AhnLab Data Diode ensures the separation of the OT network, which tends to be more secure with less exposure, by forcing one-way communication from the OT to the IT network. Customers can safely send data to external networks while restricting data transmission from outside.

01

Securing Transmitted Data

We have applied multiple cutting-edge technologies such as data encryption, forward error correction (FEC), error control, and malware inspection to AhnLab Data Diode, further reinforcing the security and integrity of transmitted data.

02

Flexible Application

Thanks to our extensive protocol support across IT and OT domains, the module deployment can be optimized for the customer environment. Its flexibility can satisfy various use cases encompassing IT/OT protocols, CCTV streaming, and databases.

03

Key Features

Establish Dynamic and Robust Data Transmission System

One-Way Communication

AhnLab Data Diode implements one-way data transmission by physically connecting the transmission line (Tx) and setting the reception line (Rx) in a switchover form. It utilizes hardware for unidirectional NIC and applies one-way protocols for stable unidirectional communication.

Data Protection

AhnLab Data Diode provides features to ensure data integrity throughout the data transmission and reception process: error recovery code insertion, transmission speed adjustment, error inspection and recovery, and packet loss management. In addition, the module encrypts transmitted data and leverages the AV engine to strengthen data protection.

Redundant Configuration

AhnLab Data Diode supports redundant configuration to ensure the stability of transmission and reception servers. When device or line malfunctions occur, administrators can perform failover without affecting the actual systems.

Tailored Deployment Options

AhnLab Data Diode offers three hardware types, supporting data transmissions from 100Mbps to 1G-10Gbps. The lineups are Mini-type (100M), Integrated (1G), and Detachable (1-10G). Customers can choose the hardware that best suits their needs.

Data Protection

AhnLab Data Diode provides features to ensure data integrity throughout the data transmission and reception process: error recovery code insertion, transmission speed adjustment, error inspection and recovery, and packet loss management. In addition, the module encrypts transmitted data and leverages the AV engine to strengthen data protection.

Redundant Configuration

AhnLab Data Diode supports redundant configuration to ensure the stability of transmission and reception servers. When device or line malfunctions occur, administrators can perform failover without affecting the actual systems.

Tailored Deployment Options

AhnLab Data Diode offers three hardware types, supporting data transmissions from 100Mbps to 1G-10Gbps. The lineups are Mini-type (100M), Integrated (1G), and Detachable (1-10G). Customers can choose the hardware that best suits their needs.

Solution

Never Allowing Unsafe Data Transmission

  • CPS Protection
    More

    CPS Protection

    A recent IT-OT convergence is demanding a unified security approach to protecting cyber-physical systems (CPS). AhnLab CPS PLUS, our CPS protection platform, successfully satisfies the security requirements of various industries.

Related Products

  • More

    AhnLab ICM

    Central monitoring and management of CPS protection modules

  • More

    AhnLab EPS

    Application/device control and malware detection for OT endpoint

  • More

    AhnLab XTD

    OT network visibility & threat and anomaly detection

  • More

    AhnLab Xcanner

    Portable AV scanning and cleaning malware for OT endpoint

  • More

    AhnLab XTG

    OT network segmentation and perimeter security

  • More

    AhnLab MDS

    Network sandboxing for addressing unknown malware

  • More

    AhnLab EPP

    Endpoint protection for IT systems in CPS environments

  • More

    AhnLab V3

    Anti-malware for IT systems in CPS environments

  • More

    AhnLab TIP

    CPS threat intelligence across IT and OT environments

Industry Recognition

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Recognized as CPS Security Leader
in Frost Radar™ 2025

“With systematic threat management process and deep asset visibility, AhnLab CPS PLUS delivers cutting-edge security for cyber-physical systems. Organizations can benefit from AhnLab’s proactive threat identification, highly accurate detection, and prioritized response with a platform-powered experience.”

Adrian Drozd, VP of Research & Practice Lead of Security Practice, Frost & Sullivan

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Together We Make CPS Environments More Secure

As a member of OT-ISAC, we work hand-in-hand with its expert analysts, sharing attack tactics, threat intelligence, and best practices to fortify defenses against evolving cyber threats. Our unified CPS protection platform, powered by abundant expertise, references, and experience, contributes to keeping a global CPS community more secure.

Resources

  • White Paper

    Unified Approach to CPS Protection

    download

  • Brochure

    AhnLab CPS PLUS

    download

  • Brochure

    AhnLab Data Diode

    download

  • Article

    Frost Radar 2025: CPS Security Market Leader

    link

  • Demo

    [Demo] AhnLab CPS PLUS – Securing CPS Network and Endpoint Asset Visibility

    link

FAQs

Frequently Asked Questions

The firewall provides segmentation and perimeter security of OT networks while allowing network communications. Customers can deploy AhnLab Data Diode to elevate the level of protection by physically blocking communication and only allowing one-way data transmission.

It is fair to say that AhnLab Data Diode delivers simple but powerful security for CPS environments where IT and OT converge.
AhnLab Data Diode is delivered in software and hardware. There are three hardware types supporting data transmissions from 100Mbps to 1G-10Gbps. The lineups are Mini-type (100M), Integrated (1G), and Detachable (1-10G). Customers can choose the hardware that best suits their needs.

Detachable and Mini-type is provided as a set of one Tx and one Rx. The Integrated option consolidates Tx and Rx. Customers can choose the hardware that best suits their needs.
Customers from different industries have implemented AhnLab Data Diode for various use cases, including railroad, water, gas, energy, smart factory, building management system (BMS), and CCTV surveillance.

For instance, there is a customer who deployed AhnLab Data Diode to build the architecture that unidirectionally transfers operational data of energy facilities to the central database server and TCP.
AhnLab Data Diode supports extensive protocols across ICS (e.g., OPC UA/DA/AE, Modbus), IT (e.g., Syslog, UDP, TCP), databases (e.g., MS_SQL, Oracle, MySQL), media, and files. It can also convert heterogeneous protocols without a relay server.