When hardening security of routers, you must obey basic network security principles to ensure that the configuration design scheme can meet security requirements to the largest extent.
A telecom network is a huge information system. It is a systematic project to ensure the security of the telecom network. Any single devices, nodes, technologies, and configurations cannot ensure the security of the entire network.
Network security is an organic whole that consists of many physical devices, security technologies, and best practice in the security field linked based on a proper security hardening configuration scheme.
Security hardening is to evaluate security threats that each system unit may encounter and to comprehensively take security defense measures to maximize the security capabilities of the system.
Ensure the smooth running of services when security hardening conflicts with services. During security hardening, the security personnel must have an in-depth communication with business departments to understand business objectives. Security hardening must serve business objectives.
Any secure networks are built through design instead of configuration. Security configurations are preceded by a security hardening scheme.
When designing security hardening, engineers must clearly understand the current system status, such as threats, vulnerabilities, security defense capabilities, and evaluate security risks comprehensively.
During design for security hardening, the responses and possible states of the system under security attacks are predictable.
The router system is huge and complex. It is of little significance to prevent attackers from finding vulnerabilities of the system by hiding internal implementation details and data storage locations for ensuring system security.
The practice proves that network security cannot be hardened after internal implementation details are hidden. Actually, an open system helps to detect problems, and therefore the corresponding preventive measures can be adopted in time.
The security defense capabilities of routers depend on the unit that has the weakest security defense capabilities.
Security hardening must consider the confidentiality, integrity, and availability of routers to really ensure the security of the system. Any single security defense measure may fail to build a robust system.