Isolation control method and firewall between transformer substation production control zone I and transformer substation production control zone II

The invention relates to an isolation control method and a firewall between a production control area I and a production control area II of a transformer substation, the firewall is deployed between the production control area I and the production control area II in an intelligent transformer substation monitoring system, and the firewall is respectively connected to switches of the production control area I and the production control area II through network cables; the isolation control method is applied to a firewall and comprises the following steps: respectively configuring white lists of MAC addresses, IP addresses and port numbers in advance; capturing a network message flowing from the production control area II to the production control area I; sequentially judging whether the MAC address, the IP address and the port number of the network message are respectively located in respective corresponding white lists or not; and if the MAC address, the IP address and the port number of the network message do