NET0992 - The management interface does not have an ACL - 'Step 3 (ip local policy route-map LOCAL_POLICY)'

Information

The management interface is not configured with both an ingress and egress ACL.

The OOBM access switch will connect to the management interface of the managed network elements. The management interface can be a true OOBM interface or a standard interface functioning as the management interface. In either case, the management interface of the managed network element will be directly connected to the OOBM network.

An OOBM interface does not forward transit traffic; thereby, providing complete separation of production and management traffic. Since all management traffic is immediately forwarded into the management network, it is not exposed to possible tampering. The separation also ensures that congestion or failures in the managed network do not affect the management of the device. If the device does not have an OOBM port, the interface functioning as the management interface must be configured so that management traffic does not leak into the managed network and that production traffic does not leak into the management network.

Cisco router-generated packets are not inspected by outgoing access-lists. To filter local traffic, IOS provides a feature called local policy routing, which enables the administrator to apply a route-map to any local router-generated traffic. To prohibit outgoing traffic from the local router to any destination other than the NOC ensure an appropriate LOCAL_POLICY is defined.

NOTE: Change 'OOBM_LOCAL_POLICY' to the policy used for the route-map of your organization's management interface.

Solution

If the management interface is a routed interface, it must be configured with both an ingress and egress ACL. The ingress ACL should block any transit traffic, while the egress ACL should block any traffic that was not originated by the managed network elements.

See Also

https://iasecontent.disa.mil/stigs/zip/U_Network_Infrastructure_Router_L3_Switch_V8R29_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7(15), CAT|II, Rule-ID|SV-20208r1_rule, STIG-ID|NET0992, Vuln-ID|V-17822

Plugin: Cisco

Control ID: d9ec520b6458b78d29fd6206cb4e038a89d6dc29e100cfb0560c46649ce2cd5d