Traffic from the managed network is able to access the OOBM gateway router

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-17817	NET0987	SV-19071r1_rule	ECSC-1	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. It is imperative that hosts from the managed network are not able to access the OOBM gateway rouiter.

STIG	Date
Perimeter L3 Switch Security Technical Implementation Guide - Cisco	2015-04-06

Details

Check Text ( C-19234r1_chk )
Review the ACL or filters for the router’s receive path and verify that only traffic sourced from the management network is allowed to access the router. This would include both management and control plane traffic.

Fix Text (F-17732r1_fix)
Ensure that traffic from the managed network is not able to access the OOBM gateway router using either receive path or interface ingress ACLs.