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Modbus TCP/IP security revolutionised

03 November 2008

MTL Instruments, for the first time in the history of industrial automation, has announced the commercial availability of a security module designed specifically for managing the leading Scada protocol, Modbus TCP. Byres Security Inc. and MTL Instruments, are introducing the Tofino Modbus TCP Enforcer Loadable Security Module (LSM), which performs detailed analysis and filtering of all Modbus TCP messages, and is certified by Modbus-IDA.

Modbus TCP/IP security revolutionised
Modbus TCP/IP security revolutionised

It allows owners of control and Scada systems to regulate Modbus network traffic to a level of detail that has never before been possible, thereby increasing network security, reliability and performance of critical systems.

“Deep packet” or “content” inspection for web email or traffic has been offered in IT firewalls for several years, but nothing has been available for the process control or Scada world. Modbus traffic could either be allowed or blocked by a standard firewall, but fine-grained control was impossible. And since the smooth flow of Modbus TCP traffic is critical to the average industrial facility, engineers usually opted to let everything pass and take their chances with security. Industry experts have been urgently calling for better control of Scada protocols.

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