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.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-96755	CISC-RT-000460	SV-105893r1_rule		Medium

Description
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.

STIG	Date
Cisco IOS XR Router RTR Security Technical Implementation Guide	2019-07-24

Details

Check Text ( C-95591r1_chk )
This requirement is not applicable for the DODIN Backbone. Verify that all traffic from the managed network to the management network or NOC and vice-versa is secured via IPsec tunnel. Step 1: Note the profile referenced for the IPSec tunnel to the NOC. interface tunnel-ipsec 30 profile IPSEC_NOC_PROFILE tunnel source GigabitEthernet0/0/0/2 tunnel destination x.1.22.2 Step 2: Note the crypto ACL that was specified in the IPSec profile. crypto isakmp keyring ISAKMP_KEYRING pre-shared-key address x.1.22.2 255.255.255.255 key encrypted 150A13141C32 ! crypto isakmp policy 10 hash sha256 encryption aes 256 authentication pre-share ! crypto ipsec transform-set IPSEC_TRANS esp-aes 256 esp-sha256-hmac mode tunnel ! crypto ipsec profile IPSEC_NOC_PROFILE set pfs group16 match address MGMT_TRAFFIC_ACL Step 3: Review the ACL defined in the crypto map and verify that the destination is the management network. ! ipv4 access-list MGMT_TRAFFIC_ACL 10 permit ipv4 10.1.34.0 0.0.0.255 10.22.2.0 0.0.0.255 ! Note: The management network is this example is 10.22.2.0/24. If the management traffic is not secured via IPsec tunnel, this is a finding.

Check Text ( C-95591r1_chk )

This requirement is not applicable for the DODIN Backbone.

Verify that all traffic from the managed network to the management network or NOC and vice-versa is secured via IPsec tunnel.

Step 1: Note the profile referenced for the IPSec tunnel to the NOC.

interface tunnel-ipsec 30
profile IPSEC_NOC_PROFILE
tunnel source GigabitEthernet0/0/0/2
tunnel destination x.1.22.2

Step 2: Note the crypto ACL that was specified in the IPSec profile.

crypto isakmp keyring ISAKMP_KEYRING
pre-shared-key address x.1.22.2 255.255.255.255 key encrypted 150A13141C32
!
crypto isakmp policy 10
hash sha256
encryption aes 256
authentication pre-share
!
crypto ipsec transform-set IPSEC_TRANS esp-aes 256 esp-sha256-hmac
mode tunnel
!
crypto ipsec profile IPSEC_NOC_PROFILE
set pfs group16
match address MGMT_TRAFFIC_ACL

Step 3: Review the ACL defined in the crypto map and verify that the destination is the management network.

!
ipv4 access-list MGMT_TRAFFIC_ACL
10 permit ipv4 10.1.34.0 0.0.0.255 10.22.2.0 0.0.0.255
!

Note: The management network is this example is 10.22.2.0/24.

If the management traffic is not secured via IPsec tunnel, this is a finding.

Fix Text (F-102433r1_fix)
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

Fix Text (F-102433r1_fix)

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