Network Security

Overview

Network security uses architecture and controls to manage who and what can communicate. Measures include segmentation, authentication, encryption, firewalls, secure routing, access control, intrusion detection, filtering, monitoring, and protected administrative interfaces.

Perimeter controls alone are insufficient when users, workloads, cloud resources, vendors, and remote devices operate across distributed environments. Encrypted malicious traffic, compromised identities, flat networks, and misconfigured rules can bypass expected boundaries.

Organizations should inventory paths, apply least privilege, isolate critical assets, secure management planes, monitor behavior, and test failover and incident containment. Rules need ownership, review, expiration, and verification against actual traffic and application dependencies. Security ownership should remain clear across carriers, cloud providers, administrators, and application teams.

For Network Security, production scope should name the relevant contracts, nodes, validators, messages, state transitions, assets, and governance privileges, the decision being supported, the accountable owner, and the time and jurisdiction boundaries.

Network Security is a security mechanism or control discipline that protects communications, devices, services, and control planes from unauthorized access, interception, manipulation, disruption, and lateral movement. Network security is continuous control of communication and trust paths, not a one-time firewall configuration around an assumed perimeter.

A production treatment of Network Security should test protection of communications, devices, services, and control planes from unauthorized access, interception, manipulation, disruption, and lateral movement within the relevant asset, decision, or service state. The Network Security context record for communications, devices, and services should preserve source data, configuration or policy version, responsible actor, exception, and outcome. Review of Network Security should determine whether safeguards addressing communications, devices, and services changed exposure in practice, not merely whether a document or setting existed.