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CISC-RT-000400 - The Cisco out-of-band management (OOBM) gateway router must be configured to transport management traffic to the Network Operations Center (NOC) via dedicated circuit, MPLS/VPN service, or IPsec tunnel.

Information

Using dedicated paths, the OOBM backbone connects the OOBM gateway routers located at the edge of the managed network and at the NOC. Dedicated links can be deployed using provisioned circuits or MPLS Layer 2 and Layer 3 VPN services or implementing a secured path with gateway-to-gateway IPsec tunnels. The tunnel mode ensures that the management traffic will be logically separated from any other traffic traversing the same path.

NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.

Solution

This requirement is not applicable for the DODIN Backbone.

Ensure that a dedicated circuit, MPLS/VPN service, or IPsec tunnel is deployed to transport management traffic between the managed network and the NOC. If an IPsec tunnel is to be used, the steps below can be used as a guideline.

Step 1: Configure the ACL for the management network as the destination. This ACL will be defined in the crypto as the interesting traffic to be forwarded into the IPsec tunnel.

R4(config)#ip access-list extended MGMT_TRAFFIC_ACL
R4(config-ext-nacl)#permit ip 10.1.34.0 0.0.0.255 10.22.2.0 0.0.0.255
R4(config-ext-nacl)#exit

Step 2: Create an ISAKMP policy for Phase 1 negotiations.

R4(config)#crypto isakmp policy 10
R4(config-isakmp)#hash sha256
R4(config-isakmp)#authentication pre-share
R4(config-isakmp)#exit

Step 3: Specify the pre-shared key and the remote peer address.

R4(config)#crypto isakmp key 0 xxxxxx address x.1.12.1

Note: Digital certificates can be utilized as an alternative.

Step 4: Create the IPSec transform set for the data encryption

R4(config)#crypto ipsec transform-set TRANS_SET ah-sha256-hmac esp-aes
R4(cfg-crypto-trans)#mode tunnel
R4(cfg-crypto-trans)#exit

Step 5: Create the crypto map.

R4(config)#crypto map IPSEC_MGMT_MAP 10 ipsec-isakmp
R4(config-crypto-map)#set peer x.1.12.1
R4(config-crypto-map)#match address MGMT_TRAFFIC_ACL
R4(config-crypto-map)#set transform-set TRANS_SET
R4(config-crypto-map)#end

Step 6: Apply the crypto map to the external interface.

R4(config)#int g0/2
R4(config-if)#crypto map IPSEC_MGMT_MAP

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS_Router_Y24M07_STIG.zip

Item Details

Category: SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|SC-7a., CAT|II, CCI|CCI-001097, CCI|CCI-004891, Rule-ID|SV-216588r991838_rule, STIG-ID|CISC-RT-000400, STIG-Legacy|SV-105715, STIG-Legacy|V-96577, Vuln-ID|V-216588

Plugin: Cisco

Control ID: a215b06726dd2d0b1b7c36f7bf3ab42ce5a3f6465422514f7591db8e9943a3be