In operational technology (OT) security, isolating critical assets from external networks is paramount. While traditional firewalls filter packets using software rules, they are ultimately running on general-purpose processors. A single software vulnerability, zero-day exploit, or administrative misconfiguration can allow bidirectional communication, leaving the internal network vulnerable to cyber attacks.
This is where FPGA (Field Programmable Gate Array) hardware comes in. Unidirectional gateways (or data diodes) leverage physical-layer circuitry to enforce a strict, one-way flow of information. The transmitting circuit is physically incapable of receiving data, and the receiving circuit is physically incapable of transmitting. By programming the gateway's logic directly onto silicon (FPGA), we eliminate the vulnerability vector of software stack manipulation. Xceltra's latest security solutions leverage this architecture to enable safe digitalization—sending sensor and telemetry data out to cloud systems without opening any path for incoming threats.