The Paranoid policy is an Internet access policy that begins with the premise that all services are blocked by default. Under this policy, the administrator must explicitly enable each service that is deemed safe and necessary. This approach ensures maximum security as it minimizes the potential attack surface by not allowing any services unless they have been vetted and approved. Additionally, this policy typically involves extensive logging of all system and network activities, which can be crucial for monitoring, auditing, and forensic purposes.
References: The concept of a Paranoid policy aligns with the best practices for securing network environments, as it emphasizes a default-deny stance and careful control over network services. This information is consistent with the objectives of the Certified Network Defender (CND) program, which advocates for stringent access controls and detailed logging to protect information systems. For the most current and detailed information, please refer to the latest Certified Network Defender (CND) documents and study guides from the EC-Council1.