9.1 System Security Protection Configuration: Enable the server firewall to restrict access to non-essential ports; regularly update system patches to fix known security vulnerabilities; configure account password policies requiring passwords to be at least 12 characters long, including uppercase and lowercase letters, numbers, and special symbols; enable the operation log audit function and retain access records for at least 90 days.

9.1 System Security Protection Configuration: Enable the server firewall to restrict access to non-essential ports; regularly update system patches to fix known security vulnerabilities; configure account password policies requiring passwords to be at least 12 characters long, including uppercase and lowercase letters, numbers, and special symbols; enable the operation log audit function and retain access records for at least 90 days.

9.1 System Security Protection Configuration: Enable the server firewall to restrict access to non-essential ports; regularly update system patches to fix known security vulnerabilities; configure account password policies requiring passwords to be at least 12 characters long, including uppercase and lowercase letters, numbers, and special symbols; enable the operation log audit function and retain access records for at least 90 days.