Management network traffic must not leak onto the managed network.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17819	NET0989	SV-19073r2_rule		Medium

Description
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. To provide separation, access control lists or filters must be configured to block any traffic from the management network destined for the managed network's production address spaces.

STIG	Date
Infrastructure Router Security Technical Implementation Guide	2018-11-27

Details

Check Text ( C-19236r4_chk )
Examine the ingress filter on the OOBM interface of the gateway router to verify that traffic is only destined to the local management address space. If the device is not configured from prohibiting management traffic off the managed network, this is a finding.

Fix Text (F-17734r2_fix)
Configure access control lists or filters to block any traffic from the management network destined for the managed network's production address spaces.