A method for providing network perimeter security assessment that involves a combination of perimeter security assessment disciplines is disclosed. A security review of a network perimeter architecture is performed along with a review of the security of data processing devices that transfer data across the perimeter of the network, a review of the security of applications that transfer data across said perimeter and a review of the vulnerability of applications or data processing devices within said perimeter from computers or users outside of said perimeter. Each of the reviews may be performed by comparison to a security policy of an enterprise that owns or controls the network.