Jason has set a firewall policy that allows only a specific list of network services and deny everything else. This strategy is known as…

The strategy Jason has set up is known as a Default Deny policy. This approach to network security is

designed to block all access by default, only allowing services that are explicitly permitted. This is a

more secure posture compared to the Default Allow policy, which allows all traffic unless it is

specifically blocked. The Default Deny strategy aligns with the principle of least privilege, ensuring

that only the minimum necessary access is granted, thereby reducing the attack surface and

potential for unauthorized access.

Reference: The concept of Default Deny is a fundamental security posture that is widely recognized

and implemented in various cybersecurity frameworks and guidelines. It is also a key feature of the

Zero Trust security model, which does not inherently trust any user or device inside or outside the

network perimeter and requires continuous verification and authorization for any access attempt.