The SDoT Security Gateway enables secure data filtering and exchange between different security domains with bidirectional capabilities and high-assurance protection. Meeting stringent security standards including DEU SECRET, EU SECRET, and NATO SECRET certifications with Common Criteria EAL4+, it handles both structured and unstructured data transmission with low latency. The gateway implements XML security labels based on NATO STANAG 4774/8 standards for data classification and is built to withstand extreme environments, suitable for tactical deployments in vehicles and weapon systems. Available in specialized variants for unidirectional transfer and industrial IT/OT applications, it provides robust security controls while maintaining efficient cross-domain data exchange.