STIGQter: STIG Summary: Forescout Network Access Control Security Technical Implementation Guide Version: 2 Release: 5 Benchmark Date: 01 Jul 2026:

Forescout must be configured to apply dynamic ACLs that restrict the use of ports when non-entity endpoints are connected using MAC Authentication Bypass (MAB). This is required for compliance with C2C Step 4.

DISA Rule

SV-233327r1113800_rule

Vulnerability Number

V-233327

Group Title

SRG-NET-000343-NAC-001470

Rule Version

FORE-NC-000190

Severity

CAT II

CCI(s)

• CCI-001958 - Authenticate organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection.

Weight

10

Fix Recommendation

Use the Forescout Administrator UI to configure the policy which identifies nonentity endpoints to complete a control action when a device is added to the MAR.

1. Log on to Forescout UI.
2. In the Policy tab, locate the Authentication and Authorization policy set.
3. Select a policy that identifies nonentity endpoints. Highlight the policy, then select "Edit".
4. From the Sub-Rules section, ensure that when a device is added to the MAR, the policy also applies one of the following actions:
-Access Port ACL.
-Endpoint Address ACL.
-WLAN Role.
-VLAN Change.

Check Contents

If DOD is not at C2C Step 4 or higher, this is not a finding.

Verify Forescout applies dynamic ACLs (or VLAN restrictions) that restrict the use of ports when nonentity endpoints are connected using MAC Address Repository (MAR).

If the NAC does not apply dynamic ACLs (or VLAN restrictions) that restrict the use of ports when nonentity endpoints are connected using MAR, this is a finding.

Vulnerability Number

V-233327

Documentable

False

Rule Version

FORE-NC-000190

Severity Override Guidance

If DOD is not at C2C Step 4 or higher, this is not a finding.

Verify Forescout applies dynamic ACLs (or VLAN restrictions) that restrict the use of ports when nonentity endpoints are connected using MAC Address Repository (MAR).

If the NAC does not apply dynamic ACLs (or VLAN restrictions) that restrict the use of ports when nonentity endpoints are connected using MAR, this is a finding.

Check Content Reference

M

Target Key

5250