The firewall product referred to in this rule refers to a system or a group of systems that implement network access control between networks or security domains with different security policies. The product scope applicable to this rule is: software or software and hardware combinations with firewall functions as the main body; personal firewall products do not apply. The above-mentioned products intended to be used in confidential information systems shall be implemented in accordance with relevant national confidentiality regulations and standards, and this rule shall not apply.