Protecting Controlled Unclassified Information (CUI) in home offices and remote locations is a practical, measurable obligation under NIST SP 800-171 Rev.2 and CMMC 2.0 Level 2 (mapped to control PE.L2-3.10.6) — this post gives a step-by-step compliance checklist, implementation notes, technical details, and small-business examples so you can translate requirements into repeatable controls and audit evidence.
What PE.L2-3.10.6 requires (practical interpretation)
At a practical level, PE.L2-3.10.6 expects organizations to apply physical protection and associated administrative and technical controls so that CUI is not exposed while personnel work from non-organizational facilities. For small businesses this means: identify where CUI may be accessed remotely, ensure devices and media are secured and encrypted, apply environmental and access protections appropriate to the risk, document policies, and collect measurable evidence of enforcement (device enrollment, encryption status, training records, etc.).
Implementation checklist (actionable items)
Convert the requirement into a checklist with acceptance criteria. Minimum items to include: 1) Inventory of devices authorized to access CUI (serial, OS, owner, enrollment status). Acceptance: device appears in MDM with current compliance state. 2) Full-disk encryption enabled and verified (BitLocker with TPM 2.0/AES 256 on Windows; FileVault on macOS). Acceptance: encryption is enforced via MDM/profile and recovery keys escrowed in a secure vault. 3) VPN or secure remote access (IPsec/IKEv2 or TLS 1.2+ VPN with MFA and no split tunneling unless justified). Acceptance: logs showing daily/weekly connections and policy enforcement. 4) Hardened home network guidance implemented (WPA3, changed router admin password, firewall enabled). Acceptance: employee attestation + spot checks. 5) Secure physical storage for printed CUI (lockable cabinet/safe) and rules for not leaving printed CUI unattended. Acceptance: signed remote-work agreement. 6) Session and screen protections (auto-lock after 1–5 minutes, screen privacy filters in shared spaces). Acceptance: device configuration profile shows timeout policy. 7) Visitor and shared-space policy for cohabitants or roommates. Acceptance: signed acknowledgement and incident reporting route. 8) Device and media handling policy (block/monitor USB usage or restrict via policy). Acceptance: DLP/endpoint controls show blocked transfers. 9) Incident reporting and chain-of-custody steps for lost/stolen devices. Acceptance: documented incident flow and at least one practice drill or tabletop. 10) Evidence collection: screenshots from MDM, policy documents, training logs, POA&M for gaps.
Technical controls and configuration details
Specify exact configurations so an assessor can validate compliance. Example technical details: enforce BitLocker with XTS-AES 256 via Intune device configuration, require TPM 2.0 and use Azure AD/Intune to escrow recovery keys; use FileVault with institutional recovery for macOS; configure VPN to use AES-GCM, IKEv2 or OpenVPN with TLS 1.2+, and integrate with MFA (e.g., FIDO2, TOTP, or Microsoft Authenticator); deploy an MDM (Intune, Jamf, VMware Workspace ONE) and require device compliance before granting access via Conditional Access policies. For remote Wi‑Fi, require employees to use a separate SSID for business devices or provide a check-list to harden home routers (change default creds, disable remote admin, enable WPA3 or WPA2 AES, apply firmware updates). Use Endpoint Detection & Response (EDR) and cloud-based DLP to prevent exfiltration; log device posture and centralize logs into a SIEM or cloud log archive to produce evidence for audits.
Real-world small-business scenarios and examples
Scenario A: A 12-person engineering consultancy allows two employees to work from home with CUI. Action: inventory and enroll all laptops in Intune, enforce BitLocker with escrowing keys to Azure AD, require VPN+MFA, provide a $150 lockable file drawer for printed CUI, and run quarterly remote audits where IT requests screenshots of Wi‑Fi SSID and router admin page. Scenario B: A single-practitioner contractor travels to client sites. Action: issue an encrypted company laptop and a hardware token for MFA, store any printed CUI in a portable locking folio when in transit, and document a loss/theft process that includes remote wipe and client notification timelines. These examples show small businesses can meet PE.L2-3.10.6 with a mix of technical controls, low-cost physical controls, and written process evidence.
Risks of not implementing PE.L2-3.10.6
Failure to secure CUI in remote settings increases risk of accidental exposure, targeted theft, and successful social engineering. Consequences include contract penalties, loss of DoD business, regulatory action, reputational harm, and potential compromise of intellectual property. From a technical perspective, unencrypted devices or untrusted networks make lateral movement and data exfiltration much easier for attackers; administratively, lack of policies and evidence leads to findings during audits and can trigger a mandatory remediation timeline or disqualification.
Compliance tips and best practices
Prioritize controls that provide high assurance with low operational friction: MDM + encryption + MFA + VPN are foundational. Keep documentation concise and focused: a remote-work policy, device inventory, training completion reports, MDM screenshots, encryption key escrow evidence, and incident response steps are the typical artifacts auditors request. Use templates and automation where possible (Intune reports, Azure AD device compliance reports, Jamf device reports). Record exceptions in a POA&M with compensating controls and timelines. Conduct periodic tabletop exercises for lost/stolen-device scenarios to prove staff readiness.
Summary
Turning PE.L2-3.10.6 into a practical compliance program for home offices and remote locations requires an inventory-first approach, enforceable technical controls (MDM, FDE, VPN+MFA), simple physical protections (lockable storage, screen privacy), documented policies and training, and repeatable evidence collection for audits. For small businesses the combination of inexpensive physical safeguards, proven MDM configurations, and clear process documentation will both reduce risk and create a defensible compliance posture that maps directly to NIST SP 800-171 Rev.2 and CMMC 2.0 Level 2 requirements.
