Security industrial switches need to be connected to routers

Yes, industrial security switches typically need to be connected to routers to enable secure communication, network segmentation, and remote access across industrial networks.Role of Industrial Switches and RoutersIndustrial switches act as high-speed data transfer stations within a local area network (LAN), connecting PLCs, sensors, cameras, and other devices. They often support VLAN segmentation, PoE, ERPS ring redundancy, and high-density device access, ensuring reliable and uninterrupted communication within the industrial environment . Industrial routers serve as the boundary guardians of the network, managing cross-network communication, security policies, and remote access. They can integrate multiple network types (wired, 4G, Wi-Fi) and provide VPN functionality for secure remote operations, enabling personnel to access devices like PLCs without exposing the network to public IPs .Connectivity and Network DesignConnecting switches to routers is essential for:Segmentation and Security: Routers enforce policies between different network zones (e.g., OT and IT) and can implement firewalls, DPI, and zero-trust access .Remote Access: Routers provide secure VPN or SD-WAN connections, allowing remote monitoring and control of industrial assets .Scalability: Switches can expand device connectivity locally, while routers aggregate traffic and interface with higher-level systems like ERP or cloud applications . Common topologies include:Star Topology: Switches connect to a central router, ideal for small to medium factories. This simplifies maintenance and allows easy port expansion .Ring Topology: Switches form a ring connected to a router, providing high redundancy and low-latency self-healing networks for large industrial parks or rail transit systems .Security IntegrationModern industrial switches and routers often embed OT security features such as zero-trust network access, DPI, and threat monitoring, reducing the need for additional appliances . This allows IT and OT teams to:Monitor traffic and detect anomaliesEnforce segmentation policiesEnable secure remote access to specific devices behind NAT boundariesBest PracticesUse IEC 62443-compliant hardware to ensure cybersecurity readiness .Deploy firewalls and DPI at the router level to inspect industrial protocols like Modbus or BACnet .Implement dual NICs on critical devices to separate engineering and production networks .Ensure redundancy with ERPS or ring protocols to maintain uptime in case of link failures . In summary, connecting industrial security switches to routers is not only necessary for basic network functionality but also critical for secure, scalable, and resilient industrial network operations. Proper design ensures seamless communication, robust security, and efficient remote management.