The production VLAN assigned from the AAA server contains IP segments not intended for untrusted resources.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-18555	NET-NAC-001	SV-20099r1_rule		Medium

Description
When policy assessment and remediation have been implemented and the advanced AAA server dynamic VLAN is mis-configured, logical separation of the production VLAN may not be assured. Non-trusted resources are resources that are not authenticated in a NAC solution implementing only the authentication component of NAC. Non-trusted resources could become resources that have been authenticated but have not had a successful policy assessment when the automated policy assessment component has been implemented.

Description

When policy assessment and remediation have been implemented and the advanced AAA server dynamic VLAN is mis-configured, logical separation of the production VLAN may not be assured. Non-trusted resources are resources that are not authenticated in a NAC solution implementing only the authentication component of NAC. Non-trusted resources could become resources that have been authenticated but have not had a successful policy assessment when the automated policy assessment component has been implemented.

STIG	Date
Network Devices Security Technical Implementation Guide	2018-11-27

Details

Check Text ( C-21582r1_chk )
Review the AAA server configuration. Have the SA display the policy groups. Have the SA display the vlan configuration. VLANs will be defined under Tunnel-Pvt-Group-ID with a tunnel type of VLAN. The dynamic VLAN definitions will have a IP pool assignment. Ensure the Production VLAN does not share the same AAA IP pool . Then verify the subnets used in other pools are not the same as the production.

Check Text ( C-21582r1_chk )

Review the AAA server configuration. Have the SA display the policy groups. Have the SA display the vlan configuration. VLANs will be defined under Tunnel-Pvt-Group-ID with a tunnel type of VLAN. The dynamic VLAN definitions will have a IP pool assignment. Ensure the Production VLAN does not share the same AAA IP pool . Then verify the subnets used in other pools are not the same as the production.

Fix Text (F-19171r1_fix)
Build different IP pools. Use different IP subnets for each pool.