Traffic from the managed network will leak into the management network via the gateway router interface connected to the OOBM backbone.
If the gateway router is not a dedicated device for the OOBM network, several safeguards must be implemented for containment of management and production traffic boundaries such as using interface ACLs or filters at the boundaries between the two networks.
Configure the OOBM gateway router interface ACLs to ensure traffic from the managed network does not leak into the management network.
Examine the egress filter on the OOBM interface of the gateway router to verify that only traffic sourced from the management address space is allowed to transit the OOBM backbone. In the example configurations below, the 10.1.1.0/24 is the management network address space at the enclave or managed network and 10.2.2.0/24 is the management network address space at the NOC.
Information Assurance Officer