Title

The Cisco ISE must authenticate all endpoint devices before establishing a connection and proceeding with posture assessment. This is required for compliance with C2C Step 4. (Cat II impact)

Discussion

Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity. However, failure to authenticate an endpoint does not need to result in connection termination or preclude compliance assessment. This is particularly true for unmanaged systems or when the Cisco ISE is performing network discovery. Authentication methods for NAC on access switches are MAC Authentication Bypass (MAB), or 802.1x.

Check Content

If DoD is not at C2C Step 4 or higher, this is not a finding. If not required by the NAC SSP, this is not a finding. Verify that the authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. If the default authorization policy within each policy set has "deny-access" or restricted access, this is not a finding.

Fix Text

If required by the NAC SSP, configure each policy set so that authorization policies have either "deny-access" or restricted access on their default authorization policy set. 1. Work Centers >> Network Access >> Policy Sets. 2. Choose ">" on the desired policy set. 3. Expand Authorization Policy. On the default authorization rule, select "Deny-Access" or a result that is configured for a restricted VLAN, Access Control List, Scalable Group Tag, or any combination of these used to restrict access.

Additional Identifiers

Rule ID: SV-242601r855858_rule

Vulnerability ID: V-242601

Group Title: SRG-NET-000343-NAC-001460

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.