The IoT Security Gateway by Gecko Security is a hardware-software solution designed to secure Internet of Things ecosystems by monitoring network traffic in real time. It employs machine learning algorithms to detect anomalies, enforces security protocols such as TLS 1.3 encryption, and filters unauthorized communication attempts across common IoT protocols like MQTT and CoAP. The gateway authenticates device identities via X.509 certificates or cryptographic keys, segments networks through VLAN tagging or firewall rulesets, and integrates with SIEM platforms via REST APIs for automated incident response actions like quarantining compromised devices. It supports over 200 IoT-specific industrial protocols out-of-the-box including Modbus RTU/TCP variants used in OT environments while maintaining compatibility with regulatory frameworks including IEC 62443-3-3 Level 2 certification requirements.