STIGQter: STIG Summary: Microsoft IIS 10.0 Site Security Technical Implementation Guide Version: 2 Release: 16 Benchmark Date: 01 Jul 2026:

A private IIS 10.0 website authentication mechanism must use client certificates to transmit session identifier to assure integrity.

DISA Rule

SV-218749r1210386_rule

Vulnerability Number

V-218749

Group Title

SRG-APP-000172-WSR-000104

Rule Version

IIST-SI-000220

Severity

CAT II

CCI(s)

• CCI-000197 - For password-based authentication, transmit passwords only cryptographically-protected channels.
• CCI-001188 - Generate a unique session identifier for each session with organization-defined randomness requirements.
• CCI-002470 - Only allow the use of organization-defined certificate authorities for verification of the establishment of protected sessions.

Weight

10

Fix Recommendation

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Double-click the "SSL Settings" icon.

Verify the "Clients Certificate Required" check box is selected.

Select "Apply" from the "Actions" pane.

Check Contents

Note: If any of the following is true, this requirement is Not Applicable:
- Authentication is offloaded to an external enterprise authentication mechanism that is performing certificate handling.
- The server being reviewed is a public IIS 10.0 web server.
- The server being reviewed is hosting SharePoint.
- The server being reviewed is hosting WSUS.
- Certificate handling is performed at the Proxy/Load Balancer.
- The server being reviewed is hosting Simple Certificate Enrollment Services (SCEP).
- The server being reviewed is hosting Network Device Enrollment Services (NDES).
- The server is providing OCSP and not otherwise hosting any content.

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Double-click the "SSL Settings" icon.

Verify the "Clients Certificate Required" check box is selected.

If the "Clients Certificate Required" check box is not selected, this is a finding.

Vulnerability Number

V-218749

Documentable

False

Rule Version

IIST-SI-000220

Severity Override Guidance

Note: If any of the following is true, this requirement is Not Applicable:
- Authentication is offloaded to an external enterprise authentication mechanism that is performing certificate handling.
- The server being reviewed is a public IIS 10.0 web server.
- The server being reviewed is hosting SharePoint.
- The server being reviewed is hosting WSUS.
- Certificate handling is performed at the Proxy/Load Balancer.
- The server being reviewed is hosting Simple Certificate Enrollment Services (SCEP).
- The server being reviewed is hosting Network Device Enrollment Services (NDES).
- The server is providing OCSP and not otherwise hosting any content.

Follow the procedures below for each site hosted on the IIS 10.0 web server:

Open the IIS 10.0 Manager.

Double-click the "SSL Settings" icon.

Verify the "Clients Certificate Required" check box is selected.

If the "Clients Certificate Required" check box is not selected, this is a finding.

Check Content Reference

M

Target Key

4051