The action of the corresponding rule: o accept(1): Packets matching this rule are accepted and will be forwarded o drop(2): Packets matching this rule will be silently discarded o reject(3): Packets matching this rule will be dropped and the originator gets informed by an ICMP message o enforce-modbus(4): Packets matching this rule are enforced by modbus enforcer and will be forwarded or discarded. The selected protocol should be tcp or udp o enforce-opc(5): Packets matching this rule are enforced by opc enforcer and will be forwarded or discarded. The selected protocol should be tcp o enforce-iec104(6): Packets matching this rule are enforced by IEC104 enforcer and will be forwarded or discarded. The selected protocol should be tcp o enforce-ethernetip(7): Packets matching this rule are enforced by EtherNet/IP enforcer and will be forwarded or discarded. The selected protocol should be tcp o enforce-dnp3(8): Packets matching this rule are enforced by dnp3 enforcer and will be forwarded or discarded. The selected protocol should be tcp