Check: CISR-RT-000010
Cisco ISR 4000 Series RTR STIG:
CISR-RT-000010
(in version v1 r1)
Title
The Cisco ISR 4000 Series router must enforce that the managed network domain and the management network domain are separate routing domains and the Interior Gateway Protocol instances are not redistributed or advertised to each other. (Cat II impact)
Discussion
If the gateway router is not a dedicated device for the out-of-band management 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 routing instances must be configured on the router, one for the managed network and one for the out-of-band management network. In addition, the routes from the two domains must not be redistributed to each other.
Check Content
Verify the Interior Gateway Protocol instance used for the managed network on the Cisco ISR 4000 Series router does not redistribute routes into the Interior Gateway Protocol instance used for the management network, and vice versa. The configuration will look similar to the example below: router ospf 1 area 1 authentication message-digest redistribute ospf 1 vrf Mgmt passive-interface default no passive-interface GigabitEthernet0/0 no passive-interface GigabitEthernet0/1 network 200.30.3.0 0.0.0.255 area 1 If the Interior Gateway Protocol instance used for the managed network redistributes routes into the Interior Gateway Protocol instance used for the management network, or vice versa, this is a finding.
Fix Text
On the Cisco ISR 4000 Series router configure the Interior Gateway Protocol instance used for the managed network to prohibit redistribution of routes into the Interior Gateway Protocol instance used for the management network, and vice versa. Use the “NO” form of the redistribute command to disable redistribution of the management network. For example: ISR4000(config-router)#no redistribute ospf 1 vrf Mgmt
Additional Identifiers
Rule ID:
Vulnerability ID: V-74115
Group Title:
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001414 |
The information system enforces approved authorizations for controlling the flow of information between interconnected systems based on organization-defined information flow control policies. |
Controls
Number | Title |
---|---|
AC-4 |
Information Flow Enforcement |