Compare apples with apples
Stateful inspection needs bidirectional visibility to do its job. A diode, by design, refuses that premise for its path—trading flexibility for a blunt guarantee on direction.
When teams deploy both
Most enterprises keep firewalls for general-purpose segmentation while inserting diode segments for specific OT analytics, cross-domain handoff, or mission exports—places where one-way semantics dominate latency-tolerant flows.
Go deeper
The comparison brief walks scenarios, trade-offs, and coexistence patterns without pretending either technology replaces the other.
Related Connexite resources
Download the full document
For diagrams, specifications, and the complete narrative as published by Connexite, use the official PDF:
Data diode vs firewall — ConnexONE (PDF)
Note: Treat numbers, certifications, and compliance mappings in the PDF as authoritative for procurement and audit; this article is editorial guidance only.