Detection and Blocking of Replay, False Command, and False Access Injection Commands in SCADA Systems with Modbus Protocol

Table 3

Configuration of frame filtering module.

IP address	Function code	Starting address	Number of registers
192.168.1.1	1	0 × 10000	100
	2	0 × 10000	250
	4	0 × 15000	300
192.168.1.2	1	0 × 10000	200
	4	0 × 25000	50
192.168.1.3	1	0 × 02001	4000
	3	0 × 40000	600
192.168.1.4	2	0 × 06000	200
	3	0 × 70000	1250