The Cisco out-of-band management (OOBM) gateway router must be configured to not redistribute routes between the management network routing domain and the managed network routing domain.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-96935	CISC-RT-000430	SV-106073r1_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; otherwise, it is possible that management traffic will not be separated from production traffic. Since the managed network and the management network are separate routing domains, separate Interior Gateway Protocol (IGP) routing instances must be configured on the router, one for the managed network and one for the OOBM network. In addition, the routes from the two domains must not be redistributed to each other.

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; otherwise, it is possible that management traffic will not be separated from production traffic. Since the managed network and the management network are separate routing domains, separate Interior Gateway Protocol (IGP) routing instances must be configured on the router, one for the managed network and one for the OOBM network. In addition, the routes from the two domains must not be redistributed to each other.

STIG	Date
Cisco IOS XE Router RTR Security Technical Implementation Guide	2020-06-30

Details

Check Text ( C-95771r1_chk )
This requirement is not applicable for the DODIN Backbone. Verify the IGP instance used for the managed network does not redistribute routes into the IGP instance used for the management network, and vice versa. The example below imports OSPF routes from the production route table (VRF PROD) into the management route table (VRF MGMT) using BGP. ip vrf MGMT rd 4:4 route-target export 4:4 route-target import 4:4 route-target import 8:8 ! ip vrf PROD rd 8:8 route-target import 8:8 route-target export 8:8 … … … router ospf 1 vrf MGMT log-adjacency-changes redistribute bgp 64512 subnets network 0.0.0.0 255.255.255.255 area 0 ! router ospf 2 vrf PROD log-adjacency-changes network 0.0.0.0 255.255.255.255 area 0 ! router bgp 64512 no synchronization bgp log-neighbor-changes no auto-summary ! address-family ipv4 vrf MGMT no synchronization redistribute ospf 1 vrf MGMT exit-address-family ! address-family ipv4 vrf PROD no synchronization redistribute ospf 2 vrf PROD exit-address-family If the IGP instance used for the managed network redistributes routes into the IGP instance used for the management network, or vice versa, this is a finding.

Check Text ( C-95771r1_chk )

This requirement is not applicable for the DODIN Backbone.

Verify the IGP instance used for the managed network does not redistribute routes into the IGP instance used for the management network, and vice versa. The example below imports OSPF routes from the production route table (VRF PROD) into the management route table (VRF MGMT) using BGP.

ip vrf MGMT
rd 4:4
route-target export 4:4
route-target import 4:4
route-target import 8:8
!
ip vrf PROD
rd 8:8
route-target import 8:8
route-target export 8:8
…
…
…
router ospf 1 vrf MGMT
log-adjacency-changes
redistribute bgp 64512 subnets
network 0.0.0.0 255.255.255.255 area 0
!
router ospf 2 vrf PROD
log-adjacency-changes
network 0.0.0.0 255.255.255.255 area 0
!
router bgp 64512
no synchronization
bgp log-neighbor-changes
no auto-summary
!
address-family ipv4 vrf MGMT
no synchronization
redistribute ospf 1 vrf MGMT
exit-address-family
!
address-family ipv4 vrf PROD
no synchronization
redistribute ospf 2 vrf PROD
exit-address-family

If the IGP instance used for the managed network redistributes routes into the IGP instance used for the management network, or vice versa, this is a finding.

Fix Text (F-102615r1_fix)
This requirement is not applicable for the DODIN Backbone. Remove the configuration that imports routes from the managed network into the management network or vice versa as shown in the example below: R1(config)#ip vrf MGMT R1(config-vrf)#no route-target import 8:8