Industrial firewall requirements

(1) Dual Motherboard, Dual Hard Drive Model: Achieved through the setup of two independent computer systems. During operation, choose between the two computer systems using the client-side switch.

(2) Single Motherboard, Dual Hard Drive Model: The client adds an isolation card and a hard drive to increase the configuration. The hard drive interface is redirected to the motherboard via the added isolation card, and the network card is also connected to produce two network interfaces. The card controls the client's storage devices while selecting the appropriate network interface, achieving the effect of network isolation.

(3) Single Motherboard, Single Hard Drive Model: The client needs to add an isolation card. The storage is connected to the motherboard via the isolation card, and the network card is also extended through the isolation card to provide two network interfaces. Divide the hard drive into secure and non-secure zones, control the client's storage device's usage of the secure and non-secure zones in a time-sharing manner via the isolation card, and simultaneously select the corresponding network interfaces to implement network isolation.