December 17, 2019 – Sequi, a developer of Modbus firewalls for industrial control networks, announced the release of the latest product to its PortBloque family. With the release of PortBloque E, Sequi is adding Ethernet firewall functionality and Modbus TCP/UDP deep packet inspection tofilterand block harmful and unwanted Modbus traffic. These capabilities make the PortBloque E a choice for automation, utility, and energy operators looking to protect serial Modbus devices from Internet attacks.
The browser-based interface provides operators with flexibility in customization. Operators can control Modbus traffic by slave IDs, function codes, and block commands that repeat too soon. Additionally, operators can define a permissible range of slave registers and values to prevent malicious memory access. The offering also provides bidirectional conversion between Modbus RTU/ASCII and Modbus TCP/UDP.
PortBloque E comes in an all-metal chassis with an RS-232 port, fast Ethernet port, and a management port (RS-232). Logs for traffic and security violations are dashboard-viewable.