The firewall, SIEM, MFA, backup, and identity tools that genuinely help you meet NIST 800-171 — each mapped to the control family it serves, chosen for a shop without a security team and vetted for US-defense supply-chain risk. Honest picks, no pay-for-placement.
There's no "CMMC in a box." The framework grades outcomes across 14 control families, and no product checks them all. What a small shop needs is the right-sized tool for each job — enough to genuinely meet a control without paying for enterprise horsepower you can't steer. This is the stack we'd deploy ourselves, organized by the control family each tool serves.
Your boundary: a firewall that segments the CUI enclave off the rest of the network and produces exportable logs. Genuine segmentation value — but note hardware like this is not FIPS-validated, so pair it with FIPS-validated encryption for the CUI itself.
VLAN segmentation, intrusion detection, and exportable logs as a one-time purchase with no monthly fee — a right-sized boundary for a small enclave. Honest caveats: it hardens and logs but doesn't make you compliant, it isn't FIPS-validated, and — an SCRM flag — Firewalla is US-owned (San Jose) but its hardware is manufactured outside the TAA-designated (allied) countries. Fine as a low-cost monitor; for the CUI enclave boundary itself, prefer a firewall with a US/allied supply chain and NIAP/Common Criteria validation.
The Audit & Accountability controls (3.3.1–3.3.9) want you to create, protect, retain, and — the part shops skip — review and correlate logs. A right-sized SIEM does the correlation and alerting (controls 3.3.4 and 3.3.5) a two-person team can't do by hand.
Built for small teams without a SOC: detections ship pre-written and tuned, a team watches alerts with you, and there's a usable free tier to start. Turns the AU review-and-respond controls from a gap into something you can actually demonstrate. Verify FedRAMP/data-handling before piping CUI-bearing logs in.
Phishing-resistant MFA is one of the highest-leverage controls you can implement. Hardware security keys (FIDO2) beat app-based codes for the accounts that touch CUI.
Phishing-resistant hardware keys for your privileged and CUI-touching accounts. For DoD work choose the YubiKey 5 FIPS series (FIPS 140-3 validated). Made by an allied-country manufacturer with US operations and US-made/FIPS options — an allied supply chain that's acceptable for federal work, even for the strictest cases. Buy two per user (primary + backup) and register both.
A business password manager enforces unique, strong credentials and gives you the access records an assessor asks about. Two solid, government-credible options — pick either.
US-owned and authorized at FedRAMP High with a FIPS 140-3 module — the right pick for a CUI environment. Buy the Government Cloud edition specifically; the authorization is on that SKU, not commercial Keeper. Central provisioning and access logs give you the answer when an assessor asks "who has access to what."
SCRM note: 1Password is a strong product, but it's foreign-owned and not FedRAMP-authorized — fine for general business, but for a CUI boundary use Keeper Government Cloud.
Email is the #1 attack path and a common finding. DMARC (with SPF and DKIM) stops spoofing of your domain and gives you visibility into who's sending as you.
Walks you from "no DMARC" to an enforced policy without the usual guesswork — parsed reports, guided setup, and monitoring. DMARC handles email-auth metadata, not CUI, so the inherent risk is lower — but note EasyDMARC is US-registered with foreign ownership and engineering ties, so for a FOCI-strict shop a US-sovereign alternative (Valimail, Proofpoint, or Microsoft's native DMARC reporting) is the cleaner call. Otherwise, the fastest way to close the email-spoofing gap.
You need recoverable backups and log retention you can point at. Cheap, durable cloud storage covers the "keep it a year" side of the audit controls without enterprise pricing.
Durable, low-cost cloud object storage from a US public company — a clean home for non-CUI backups and log archive. SCRM note: Backblaze B2 is not FedRAMP-authorized, so don't store CUI backups there — keep CUI backups in Azure Gov / GCC High storage or a FedRAMP-authorized service. Great for everything outside the CUI boundary.
Remote work killed the "castle and moat." Zero-trust network access gives least-privilege, identity-based connections instead of a flat VPN into everything. SCRM note: if this sits in front of CUI it must be FedRAMP-authorized and US-sovereign — which rules out popular consumer/foreign options. NordLayer is foreign-owned and not FedRAMP-authorized; Tailscale and Twingate are foreign and/or unauthorized. Don't put CUI behind any of them.
If your CUI already lives in GCC High / Azure Government, Entra Conditional Access gives you identity-centric, least-privilege access — MFA, device compliance, and risk conditions — natively, with no extra VPN and less attack surface. For most small shops this is the most compliant and cheapest answer. (Microsoft's own ZTNA product, Entra Private Access, isn't in GCC High yet — host private apps in Azure Gov and gate them here.)
Need network-layer reach to on-prem private apps? Use a US-owned, FedRAMP-authorized ZTNA — not a consumer VPN. Realistic small-shop picks: Cisco Secure Access + Duo Federal (FedRAMP Moderate, FIPS 140-2) or Cloudflare Zero Trust (FedRAMP Moderate) for the cheapest authorized on-ramp; Zscaler Private Access (ZPA Gov) (FedRAMP High) when budget allows the strongest posture. All US-based and authorized to carry CUI.
If you handle CUI — especially CUI Specified like ITAR — your email and file storage generally need to meet FedRAMP requirements, which usually means Microsoft GCC High / Azure Government. This is a reseller/MSP world, not a click-to-buy tool, so plan the enclave before you buy anything else.
Every tool above does technical work — but an assessor grades documentation and evidence: your System Security Plan, the required policies, a POA&M, and proof the controls operate. This is where most of a consultant's five-figure bill actually goes, and it's the most substitutable cost in the stack.
The documentation a consultant would bill $40k–$90k to produce: a pre-written SSP, all 20 required policies, a POA&M template, an evidence checklist, and a per-control SPRS scorer — editable, one-time, built for a small shop doing this itself.
The 15-minute pre-purchase check on one printable page: Section 889, FASCSA, the 1260H list, DFARS 7012 hosting, and TAA — plus the six official lists to verify against. It's how the government screens its own suppliers.
The smartest first move isn't buying — it's finding out which control families you're weakest in, so you spend on what actually moves your score. Estimate your NIST 800-171 self-assessment score across all 14 families in about two minutes, free.