NSFocus operation and maintenance security management system (commonly known as bastion host) provides an advanced 4A operation and maintenance security management and audit solution. Using physical bypass and logical serial deployment methods, it helps enterprises solve problems such as "difficult asset management", "confusing operation and maintenance authority", and "difficult to trace operation and maintenance" through the establishment of unified security operation and maintenance access control, real-time blocking of risk orders, unaware password hosting, and operation behavior recording and broadcast auditing. Achieve the goals of reducing human safety risks, meeting compliance requirements, and safeguarding enterprise efficiency.