MODBUS/Node Red - Poor Security

Hey Modbus ppl…

Am I correct in saying that Modbus is really insecure over TCP as the packets are easily found using stock packet sniffers?

How would I go about securing my ethernet Modbus TCP network? I am using the Node Red Flex Getter nodes and there doesnt appear to be anything that even allows for packet encryption despite my ethernet-422 hub supporting TLS. This obviously opens things up to a compromized network, packet sniffing and MiM attacks.

You could connect an ESPHome device to your modbus controller and use that an an intermediary between modbus and Home Assistant. ESPhome supports noise encryption.

Now that might be an idea??? Thanks @tom_l

Now to go and investigate modbus on esphome. esphome is easy, modbus diy - not so easy :+1: