What is a non-routing dual-homed host?

A non-routing dual-homed host refers to a bastion host that has two network connections which do not interact with each other. In this configuration, each network interface is connected to a different network, enhancing security by isolating each network traffic and reducing the risk of unauthorized access. This allows for the implementation of stringent security controls and reduces the attack surface, as the two interfaces can have different security policies.

This design is significant because it allows the host to serve as a point of control between different networks while ensuring that data transfers remain secure and compartmentalized. Because the connections do not interact or share data, the risk of one interface compromising the other is minimized, making this setup particularly useful in network defense strategies.

The other configurations described do not align with the concept of a dual-homed host in this manner. For instance, a dual-homed host with interacting connections would pose a greater risk and undermine the security benefits that the non-routing design aims to achieve. Additionally, a single-homed host or a regular server lacks the enhanced security features and isolation provided by the dual-homed configuration.