Endian 4i is an industrial-grade security gateway designed specifically for operational technology (OT) environments. The solution provides advanced protection for industrial networks through robust hardware appliances or flexible software/virtual deployments. The hardware version features a ruggedized chassis with DIN rail support, extended temperature range (-20°C to +60°C), and industrial power supply capabilities, making it suitable for harsh industrial conditions. The gateway supports critical industrial protocols and provides secure remote access for OT environments. It offers cellular and WiFi connectivity options supporting 4G and 5G networks, along with digital I/O and industrial serial compatibility. The solution is designed to protect and monitor industrial networks while ensuring reliable connectivity in demanding conditions. Endian 4i can be deployed as pre-configured hardware appliances built to withstand harsh industrial environments and deliver high-performance security, or as a software/virtual solution that can be deployed on existing hardware or as a virtual machine for scalable security implementations. The platform includes IoT protocol support and is specifically engineered to address the unique challenges of industrial networks, including seamless connectivity requirements and support for specialized industrial protocols. The solution provides threat monitoring capabilities and network segmentation to secure critical industrial infrastructure.