STIGQter: STIG Summary: Cisco ISE NAC Security Technical Implementation Guide Version: 2 Release: 4 Benchmark Date: 01 Jul 2026:

The Cisco ISE must verify host-based firewall software is running on posture required clients defined in the NAC System Security Plan (SSP) prior to granting trusted network access. This is required for compliance with C2C Step 4.

DISA Rule

SV-242578r1146387_rule

Vulnerability Number

V-242578

Group Title

SRG-NET-000015-NAC-000020

Rule Version

CSCO-NC-000040

Severity

CAT I

CCI(s)

• CCI-000213 - Enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Weight

10

Fix Recommendation

If required by the sites' NAC SSP, configure the posture policy to verify that a host-based firewall is running.

1. Navigate to Work Centers >> Posture >> Policy Elements.

2. Create Firewall Condition.
a. Expand "Conditions" on the left of the page.
b. Choose "Firewall Condition".
c. Choose "Add".
d. Define a Name.
e. Select the applicable Compliance Module.
f. Select the Operating System.
g. Select the vendor of firewall.
h. Check "enable".
i. Select the desired product/products.
j. Choose "Save".

3. Create Firewall Remediation.
a. Expand "Remediation's" on the left of the page.
b. Choose "Firewall".
c. Choose "Add".
d. Define a Name.
e. Select the Operating System.
f. Select the applicable Compliance Module.
g. Select the Remediation Type.
h. Define the interval between retries.
i. Define Retry Count.
j. Select the desired Vendor Name.
k. Check "Remediation Option is to enable the Firewall".
l. Select the Product Name.
m. Choose "Submit".

4. Create Requirements.
a. Choose "Requirements" on the left of the page.
b. Choose the drop-down located next to "Edit" on the right side of the page where the requirement is to be inserted.
c. Choose "Insert new Requirement".
d. Define a Name.
e. Select the Operating System.
f. Select the applicable Compliance Module.
g. Select the Posture Type.
h. Select the Condition previously configured.
i. Select the Remediation Action previously configured and type in a message to display.
j. Choose "Done".
k. Choose "Save".

5. Edit the Posture Policy.
a. Navigate to Work Centers >> Posture >> Posture Policy.
b. Find the Posture Policy that will be applied to the posture required endpoints.
c. Select the Requirement ensuring there is a green check box to the left of the name indicating it is a mandatory requirement.
d. Choose "Done".
e. Choose "Save".

Check Contents

If DoD is not at C2C Step 4 or higher, this is not a finding.
If host-based firewall is not required by the NAC SSP, this is not a finding.

Verify that the posture policy will verify that a host-based firewall is running.

1. Navigate to Work Center >> Posture >> Posture Policy.
2. Review the enabled posture policies analyzing all the conditions.
3. Review the requirements listed on polices that the posture required clients will use.
4. Navigate to Work Center >> Posture >> Policy Elements.
5. Review the requirements applied in the posture policy to ensure there is one with a firewall condition applied.
6. Review the firewall condition ensuring it is configured to verify that the client firewall is enabled.

If there is not a firewall condition tied to a requirement that is applied to an applicable posture policy, this is a finding.

Vulnerability Number

V-242578

Documentable

False

Rule Version

CSCO-NC-000040

Severity Override Guidance

If DoD is not at C2C Step 4 or higher, this is not a finding.
If host-based firewall is not required by the NAC SSP, this is not a finding.

Verify that the posture policy will verify that a host-based firewall is running.

1. Navigate to Work Center >> Posture >> Posture Policy.
2. Review the enabled posture policies analyzing all the conditions.
3. Review the requirements listed on polices that the posture required clients will use.
4. Navigate to Work Center >> Posture >> Policy Elements.
5. Review the requirements applied in the posture policy to ensure there is one with a firewall condition applied.
6. Review the firewall condition ensuring it is configured to verify that the client firewall is enabled.

If there is not a firewall condition tied to a requirement that is applied to an applicable posture policy, this is a finding.

Check Content Reference

M

Target Key

5383