Several companies in the OT cybersecurity space provide hardware-based unidirectional gateways or data diodes designed to isolate secure operational networks. These systems enforce one-way data transmission from protected OT networks to less secure IT or cloud environments by physically preventing return traffic.
PacketViper, by contrast, achieves similar one-way control logically through TCP flag enforcement, directional rules, and Active Deception. While hardware solutions rely on immutable physical design, PacketViper provides software-enforced, adaptive control — enabling one-way behavior with situational awareness and automated intelligence.
A pair of devices: Transmitter (TX) and Receiver (RX) connected via a fiber-optic one-way link.
The transmitter can only send data; the receiver can only detect it — eliminating the physical possibility of return communication.
This design prevents commands, malware, or exploits from entering the protected network.
Vendors typically provide protocol connectors (e.g., OPC, Modbus, DNP3, SQL, Syslog) that replicate OT data to mirrored servers in the enterprise zone.
IT systems access these mirrored datasets as if they were live OT data — without touching the original control systems.
Sending SCADA or historian data to enterprise systems.
Exporting tamper-proof logs or telemetry.
Maintaining OT visibility without introducing inbound risk.
Absolute isolation: No inbound communication path.
Compliance-ready: Meets strict security standards (e.g., NERC CIP, IEC 62443).
No configuration risk: Protection cannot be overridden by software or misconfiguration.
PacketViper enforces one-way traffic logically using custom TCP flag rules and directional policy enforcement at the edge.
| Direction | TCP Flag | Action | Result |
|---|---|---|---|
| Outbound | SYN | Allow | Internal systems can initiate outbound sessions. |
| Inbound | SYN | Block | External entities cannot start sessions. |
| Inbound | ACK | Drop | Prevents spoofed or unauthorized replies. |
| Inbound | Any | Deceive | Activates Active Deception and logs or blocks the source. |
This configuration creates a logical one-way channel where outbound communication is permitted, and inbound initiation or acknowledgment is denied.
Applied Intelligence: Automatically blacklists malicious sources and propagates rules across all PacketViper deployments.
Active Deception: Responds to unauthorized attempts with false information, captures credentials, and blocks the attacker.
Zero Trust Enforcement: Ensures communication occurs only between approved sources, destinations, and ports.
| Aspect | Hardware One-Way Solutions | PacketViper (Logical Data Diode) |
|---|---|---|
| Enforcement Type | Physical (optical TX→RX) | Logical (TCP flag & direction rules) |
| OSI Layer | Below Layer 1 | Layer 3–4 (TCP/IP stack) |
| Control | Fixed one-way | Programmable, adaptive one-way |
| Inbound Protection | Physical impossibility | Software enforcement + deception |
| Visibility | Minimal or none | Full telemetry, alerts, logging |
| Integration | Limited to supported protocols | Any IP-based service or protocol |
| Flexibility | None | High — dynamic and intelligent |
| Maintenance | Hardware upkeep | Policy and configuration management |
| Deception Capabilities | None | Active Deception and Decoy Shifting |
Dynamic enforcement: Adapts policies based on real-time threat behavior.
Visibility: Logs and alerts provide operational intelligence beyond physical diodes.
Flexibility: Works with all IP-based protocols without middleware.
Deception: Adds Active Deception for proactive threat mitigation.
Efficiency: No need for specialized hardware or fiber installations.
Hardware data diodes guarantee isolation. PacketViper guarantees isolation and intelligence.
Goal: Securely transmit telemetry from an OT network to IT or SOC systems without allowing inbound access.
Configuration Steps:
Outbound TCP SYN → Allow.
Inbound TCP SYN / ACK → Block or Drop.
Enable Active Deception for inbound scans or connection attempts.
Activate Applied Intelligence to propagate block rules across sites.
Monitor system activity and logs through PacketViper’s management UI.
Outcome:
OT sends telemetry outward.
IT/cloud systems receive analytics data safely.
Inbound attempts trigger deception, alerts, and global blocking.
This achieves the same unidirectional protection as hardware data diodes — with adaptive visibility and enforcement.
PacketViper can operate as a logical data diode, delivering:
Directional control of TCP flows.
Real-time adaptive blocking and deception.
Automatic intelligence sharing across enterprise boundaries.
Unlike hardware-only diodes that simply prevent communication, PacketViper both prevents and learns, extending Zero Trust into OT environments with applied intelligence.
In essence:
PacketViper = Data Diode + Deception + Intelligence.