Modbus/TCP Device Identification
Medium Nessus Plugin ID 83301
SynopsisRead the Modbus/TCP Device Identification using the Encapsulated Interface Transport code 43 and MEI Type 14.
DescriptionNessus sent a Modbus Encapsulated Interface read request with MEI type 14 to obtain the device's Vendor Name, Product Code, and Major and Minor Revision. If supported, the data can include Vendor URL, Product Name, Model Name, and User Application Name. The alternative is to detect Modbus on valid error responses from a device not supporting the function code 43 and MEI 14.
SolutionRestrict access to the Modbus port (TCP/502) to authorized Modbus clients.