Protection method, firewall system and equipment

The invention relates to the technical field of firewalls, and discloses a protection method, a firewall system and equipment, and the firewall equipment comprises a management module and a firewall module. The firewall module comprises a processor, a memory module, a BIOS module, a data interface expansion module and a storage module; the management module comprises a substrate management controller, a management interface module, a state monitoring module and a firmware flash memory chip; the method comprises the following steps: deploying a security policy sent by an upper computer into a firewall module through a management interface of a management module; detecting whether each firewall module reaches a network access condition or not through the management module; and if yes, the management module allows network access to the firewall module so as to receive the data packet through a data interface extension module of the firewall module, and forwards the data packet passing the protection processing t