You can’t protect your devices if you don’t have visibility of their status. Managed switches are often the first step in improving OT cybersecurity because they provide the device-level visibility and control needed to manage industrial networks securely.

Our secure managed switches help operators see network status, identify connected devices, monitor port traffic, and apply built-in security features. This gives OT teams better awareness of their environment, creates the foundation for stronger device access control, and provides more information for incident response.

Industrial firewalls and secure managed switches serve different but complementary roles in an OT security architecture. Firewalls protect boundaries between zones, while managed switches enforce device access control within the network itself. Switches with VLAN and Access Control List (ACL) support let administrators limit access to only the systems, users, and traffic flows required for specific roles or operations. This prevents unauthorized access and helps restrict lateral threat movement across the plant network.

By combining high bandwidth up to 10GbE and advanced redundancy mechanisms for millisecond-level network recovery, our secure managed switches minimize disruptions and help maximize operational uptime. These capabilities help reduce communication interruptions, maintain stable connections between controllers and devices, and support high availability for critical industrial applications.

Centralized network management software gives small OT teams a clear view of the entire industrial network without requiring manual inspection of each switch. Moxa’s MXview One automatically discovers managed switches and generates a real-time visual topology map. It also supports at-a-glance network health monitoring, centralized configuration backup, and event log review. These functions help teams detect issues faster, troubleshoot root causes more efficiently, and maintain reliable network operations at scale.

Use devices that support Network Address Translation (NAT). Our secure routers and dedicated NAT devices allow multiple OEM machines with the same internal IP address to be connected to the same plant network without changing PLC logic or modifying the original machine configuration. With 1:1 NAT, each machine’s internal IP address is mapped to a unique external plant-network address. This speeds up the deployment of identical machines and hides internal addresses from external exposure.

Industrial firewalls that support Layer 2 Transparent Bridge mode, such as our EDF-G1002-BP Series, can be inserted directly in front of a vulnerable legacy device without changing the existing IP subnet, routing design, or overall network topology. Using deep packet inspection (DPI) and virtual patching, these firewalls establish a transparent security perimeter that protects legacy systems from malicious traffic.

Choose an industrial firewall with hardware-level bypass technology. Our EDF-G1002-BP and EDR-G9004 Series include Gen3 LAN Bypass, which helps maintain network communications if the device loses power or experiences a system failure.

In such an event, internal relays automatically bridge the connection so critical traffic can continue to pass between PLCs, remote I/O, and other control devices.

No. Moxa’s OT-focused security solutions are designed to ensure that essential functions such as routing and stateful firewall filtering continue operating even if an advanced security subscription expires.

If an IPS subscription lapses, the firewall will stop receiving new intrusion prevention signature updates but will continue running with the last downloaded signature database. Core traffic forwarding functions remain active to help prevent unexpected production impact and maintain baseline protection.