SV-285314r1268215: Windows Server 2025 OpenSSH must display the Standard Mandatory DoW Notice and Consent Banner before granting remote access to the system via an OpenSSH logon. | Microsoft Windows Server 2025 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2025 OpenSSH must display the Standard Mandatory DoW Notice and Consent Banner before granting remote access to the system via an OpenSSH logon.

Description

Discussion Text

The warning message reinforces policy awareness during the logon process and facilitates possible legal action against attackers. Alternatively, systems whose ownership should not be obvious must ensure usage of a banner that does not provide easy attribution. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00089

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000048Not mappedCCI-001384Not mappedCCI-001385Not mappedCCI-001386Not mappedCCI-001387Not mappedCCI-001388

References

DPMS Target Microsoft Windows Server 2025 DISA DPMS Target Microsoft Windows Server 2025 5719

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.windows2025:def:285314
# Windows Server 2025 OpenSSH must display the Standard Mandatory DoW Notice and Consent Banner before granting remote access to the system via an OpenSSH logon.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# C:\ProgramData\ssh\sshd_config:banner filepath
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '(?i)^\s*(?!#)\s*banner\s+(?!(?i:none)(?:\s*(?:#.*)?)?$)([A-Za-z]:\\[^\s#]+)\s*(?:#.*)?$' 'C:\ProgramData\ssh\sshd_config' &>/dev/null
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.windows2025:def:285314


FILEPATH="C:\\ProgramData\\ssh\\sshd_config"
BANNER_PATTERN="^\\s*(?!#)\\s*banner\\s+(?!(?i:none)(?:\\s*(?:#.*)?)?$)([A-Za-z]:\\\\[^\\s#]+)\\s*(?:#.*)?$"

if [ ! -f "$FILEPATH" ]; then
  echo "PASS"
  exit 0
fi

if grep -P "$BANNER_PATTERN" "$FILEPATH" &> /dev/null; then
  echo "PASS"
  exit 0
else
  echo "FAIL"
  exit 1
fi

Remediation

To configure the system, add or modify the following line in the "$env:ProgramData/ssh/sshd_config" file.

An example configuration line is:

Banner C:\ProgramData\ssh\Banner.txt

Restart the OpenSSH service for the settings to take effect.