SPGControls
Member
Does anyone have a suggestion for how to filter function codes that are sent to (or responded to by) a Modbus slave device?
I'm trying to prevent write access to a Modbus device that is a slave on a larger network. I want the SCADA system to be able to read from it, but there have been events in the past where data has been overwritten by other devices on a given network. I can't seem to find any sort of firewall hardware to put between the slave and the network that would prevent this. Tofino makes a factory-level solution, but I'm hoping to implement something at the machine level.
I'm trying to prevent write access to a Modbus device that is a slave on a larger network. I want the SCADA system to be able to read from it, but there have been events in the past where data has been overwritten by other devices on a given network. I can't seem to find any sort of firewall hardware to put between the slave and the network that would prevent this. Tofino makes a factory-level solution, but I'm hoping to implement something at the machine level.