It is necessary to upgrade the feature library of hardware firewall. The upgrade of feature library can improve the ability and efficiency of hardware firewall to detect intrusion, virus, application identification, IP reputation, malicious domain name, file reputation and IP address. With the constant change and upgrade of network threats, the feature library of hardware firewall must be constantly updated and upgraded to cope with new threats and attacks. By upgrading the feature library, the hardware firewall can more effectively identify and defend various network threats and protect the security of the network environment. The upgrade of feature library must be carried out by a professional security team or security vendor to ensure the security and stability of the upgrade. In addition, the feature library upgrade of the hardware firewall must match the version and configuration of the hardware firewall to ensure the effectiveness and compatibility of the upgrade.