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CISC-RT-000460 - The Cisco router providing connectivity to the Network Operations Center (NOC) must be configured to forward all in-band management traffic via an IPsec tunnel.

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Information

When the production network is managed in-band, the management network could be housed at a NOC that is located remotely at single or multiple interconnected sites. NOC interconnectivity, as well as connectivity between the NOC and the managed network, must be enabled using IPsec tunnels to provide the separation and integrity of the managed traffic.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

This requirement is not applicable for the DODIN Backbone.

Ensure that all traffic from the managed network to the management network is secured via IPsec tunnel as shown in the configuration examples below.

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.

RP/0/0/CPU0:R3(config)#Ipv4 access-list MGMT_TRAFFIC_ACL
RP/0/0/CPU0:R3(config-ipv4-acl)#permit ip 10.1.34.0 0.0.0.255 10.22.2.0 0.0.0.255

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

RP/0/0/CPU0:R3(config)#crypto isakmp policy 10
RP/0/0/CPU0:R3(config-isakmp-policy)#authentication pre-share
RP/0/0/CPU0:R3(config-isakmp-policy)#hash sha256
RP/0/0/CPU0:R3(config-isakmp-policy)#encryption aes 256
RP/0/0/CPU0:R3(config-isakmp-policy)#exit

Step 3: Configure the keyring to be used for ISAKMP to authenticate the remote side during IKE negotiation.

RP/0/0/CPU0:R3(config)#crypto isakmp keyring ISAKMP_KEYRING
RP/0/0/CPU0:R3(config-crypto-keyring)#pre-shared-key address 255.255.255.255 key xxxxx
RP/0/0/CPU0:R3(config-crypto-keyring)#exit

Step 4: Configure the IPSec transform set.

RP/0/0/CPU0:R3(config)#crypto ipsec transform-set IPSEC_TRANS esp-aes 256 esp-sha256-hmac
RP/0/0/CPU0:R3(config-transform-set IPSEC_TRANS)#mode tunnel

Step 5: Configure the IPSec profile.

 RP/0/0/CPU0:R3(config)#crypto ipsec profile IPSEC_NOC_PROFILE
RP/0/0/CPU0:R3(config- IPSEC_NOC_PROFILE)#set pfs group 16
RP/0/0/CPU0:R3(config- IPSEC_NOC_PROFILE)#match MGMT_TRAFFIC_ACL transform-set IPSEC_TRANS
RP/0/0/CPU0:R3(config- IPSEC_NOC_PROFILE)#exit

Step 6: Configure the IPSec virtual interface.

RP/0/0/CPU0:R3(config)#interface tunnel-ipsec 22
RP/0/0/CPU0:R3(config-if)#profile IPSEC_NOC_PROFILE
RP/0/0/CPU0:R3(config-if)#tunnel source GigabitEthernet0/0/0/2
RP/0/0/CPU0:R3(config-if)#tunnel destination x.1.22.2
RP/0/0/CPU0:R3(config-if)#end

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Cisco_IOS-XR_Router_Y23M10_STIG.zip

Item Details

References: CAT|II, CCI|CCI-001097, Rule-ID|SV-216774r531087_rule, STIG-ID|CISC-RT-000460, STIG-Legacy|SV-105893, STIG-Legacy|V-96755, Vuln-ID|V-216774

Plugin: Cisco

Control ID: b974e6df7cacbe20e97fe709afbd149638a788337b2bd68cb1c5dc300cbdf7a2