A public IIS 10.0 website must only accept Secure Socket Layer (SSL) connections when authentication is required.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-218738	IIST-SI-000204	SV-218738r1022673_rule	CCI-000068	medium
Description
Transport Layer Security (TLS) encryption is a required security setting for a private web server. Encryption of private information is essential to ensuring data confidentiality. If private information is not encrypted, it can be intercepted and easily read by an unauthorized party. A private web server must use a FIPS 140-2-approved TLS version, and all non-FIPS-approved SSL versions must be disabled. NIST SP 800-52 specifies the preferred configurations for government systems.
STIG			Date
Microsoft IIS 10.0 Site Security Technical Implementation Guide			2025-06-09

Related Frameworks

3 paths across 3 frameworks

NIST 800-531 mapping

AC-17(2)

1.00

DISA · 2 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent

NIST 800-1711 mapping

3.1.13

1.00

DISA · 2 · disa_xccdf · related
DISA · 2025-01-23 · disa_cci_list · equivalent
NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent

CCI1 mapping

CCI-000068

1.00

DISA · 2 · disa_xccdf · related

Details

Check Text (C-218738r1022673_chk)

Note: If the server being reviewed is a private IIS 10.0 web server, this is Not Applicable. Note: If the server being reviewed is a public IIS 10.0 web server not requiring authentication, this is Not Applicable. Note: If the server being reviewed is hosting SharePoint, this is Not Applicable. Note: If the server being reviewed is hosting WSUS, this is Not Applicable. Note: If the server being reviewed is hosting Simple Certificate Enrollment Services (SCEP), this is Not Applicable. Note: If the server being reviewed is hosting Network Device Enrollment Services (NDES), this is Not Applicable. Follow the procedures below for each site hosted on the IIS 10.0 web server: Open the IIS 10.0 Manager. Click the site name. Double-click the "SSL Settings" icon. Verify "Require SSL" check box is selected. If the "Require SSL" check box is not selected, this is a finding.

Fix Text (F-20209r505266_fix)

Note: If the server being reviewed is a private IIS 10.0 web server, this is Not Applicable. Follow the procedures below for each site hosted on the IIS 10.0 web server: Open the IIS 10.0 Manager. Click the site name. Double-click the "SSL Settings" icon. Select "Require SSL" check box. Select "Apply" from the "Actions" pane.