cmmc-nist-800-171-ngfw-compliance

cmmc-nist-800-171-ngfw-compliance is a skill for Codex from fastrevmd-lab/fwskillsshare. It costs 96 tokens per session (4,065 once invoked), scanned A, original, MIT.

A research and assessment guide for mapping firewall controls and evidence to CMMC Level 2 and NIST SP 800-171. These are cybersecurity requirements for protecting Controlled Unclassified Information, or CUI, in contractor environments.

In plain words
What is it for?
It helps assess CUI network boundaries, access restrictions, remote access, firewall evidence, System Security Plans, remediation plans, and requirements such as least privilege and boundary protection.
Why use it?
It clarifies what a next-generation firewall can support and what additional policies, evidence, monitoring, and system controls an assessment requires.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: names the AskUserQuestion tool; mentions Codex.

Good fit It helps assess CUI network boundaries, access restrictions, remote access, firewall evidence, System Security Plans, remediation plans, and requirements such as least privilege and boundary protection.

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Install with agentmods
npx agentmods add skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add fastrevmd-lab/fwskillsshare --skill cmmc-nist-800-171-ngfw-compliance
Clone the repo
git clone --depth 1 https://github.com/fastrevmd-lab/fwskillsshare

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cmmc-nist-800-171-ngfw-compliance

README.md
[![agentmods](https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance/github.svg)](https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance)
Your own site
<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cmmc-nist-800-171-ngfw-compliance

Your own site · 80×15
<a href="https://agentmods.dev/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance"><img src="https://agentmods.dev/badge/skills/fastrevmd-lab/fwskillsshare/cmmc-nist-800-171-ngfw-compliance.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,065 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00096 $0.04065
Opus 5 $0.00048 $0.02032
Sonnet 5 $0.00019 $0.00813
Haiku 4.5 $0.00010 $0.00407

Measured 12d ago against content hash 5b75bc60668e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

cmmc-nist-800-171-ngfw-compliance scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/cmmc-nist-800-171-ngfw-compliance/SKILL.md · 235 lines

How it starts

The opening of the file, as written. The whole thing — 235 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CMMC / NIST 800-171 NGFW Compliance Research

Overview

Use this skill to answer questions like “what does an NGFW need to do for CMMC Level 2?” or “is this firewall design sufficient for NIST 800-171 boundary protection around CUI?” The core answer is: a next-generation firewall is not CMMC compliant by itself. CMMC and NIST SP 800-171 are assessed against the contractor environment, the systems that store, process, or transmit Controlled Unclassified Information (CUI), and the policies, procedures, people, evidence, and technical controls used to protect that CUI.

An NGFW can be a major supporting control. It can enforce CUI enclave segmentation, boundary protection, default-deny access, remote-access restrictions, external connection control, secure administrative access, IDS/IPS, threat prevention, logging, and incident response visibility. It only supports CMMC/NIST 800-171 when it is selected through risk and scope decisions, configured according to documented policy, monitored, reviewed, maintained, and tied to System Security Plan (SSP), assessment objective, and remediation evidence.

Treat this as research and assessment guidance, not legal advice and not a C3PAO, assessor, DoD, or contracting-officer determination. When producing formal compliance language, cite NIST SP 800-171 requirement IDs and CMMC practice language where applicable, label assumptions, and defer final interpretation to the organization’s CMMC lead, compliance team, legal counsel, prime/customer, or authorized assessor.

Runtime intake

Before starting the workflow, inspect the request, supplied artifacts, and available approved read-only evidence. If unresolved facts could materially change safety, scope, correctness, confidence, or the requested output, read references/runtime-intake.md.

For each unresolved material fact whose catalog condition is true, invoke Claude AskUserQuestion or Codex request_user_input before continuing or issuing an open-ended request. Ask at most three single-select catalog questions per round. After each response, ask another round whenever any unresolved material catalog condition remains true; continue only when none remain. Do not repeat answered questions or show the full catalog. Without a native tool, present each selected catalog question with its 2-3 labeled choices and a free-text Other path in concise plain text; do not substitute a generic checklist.

Read the full file on GitHub · 235 lines

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 235 lines · 96 tokens per session scan A 5b75bc60668e

Subscribe to this mod's changes

cmmc-nist-800-171-ngfw-compliance is a skill published in the GitHub repository fastrevmd-lab/fwskillsshare (9 stars, last pushed today), licensed MIT. It adds 96 tokens to every session and 4,065 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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