27.7.1 Overview

The inter-port relay blocking functionality blocks communication on all specified ports. This can improve security when applied to connections with servers for which only access from specific ports is allowed, and connections with terminals for which direct communication is to be blocked.

The figure below shows an example application. In this example, administrator servers block access from normal terminals, allowing access only from other administrator servers. Also, direct communication between terminals is blocked, to enhance the security of each terminal.

Figure 27-5: Example of application of the inter-port forwarding blocking facility