What This Objective Requires
AC.L2-3.1.16[a] requires organizations to define when remote access to systems that handle Controlled Unclassified Information (CUI) is authorized. The goal is to prevent informal or ad hoc remote access by requiring explicit policy conditions and approved methods.
This objective is about clarity: who is allowed to connect remotely, what systems can be accessed, what technologies are permitted, and under what circumstances remote access is acceptable. Clear authorization rules help ensure remote connectivity supports business needs without expanding risk unnecessarily.
Why Defining Remote Access Authorization Matters
Remote access can be one of the highest-risk access paths into CUI systems. If authorization rules are vague, teams may allow convenience-based tools or inconsistent access methods that are difficult to monitor and secure.
Defining authorization criteria supports least privilege and creates a defensible standard for remote access decisions, which is important for both security operations and broader CMMC Level 2 compliance.
How to Define When Remote Access Is Authorized
Start with a written remote access policy that states remote access is permitted only through approved methods and only for authorized roles. Define which systems are in scope, what data can be accessed remotely, and whether remote access is allowed from corporate-managed devices only.
Specify required safeguards such as multi-factor authentication, encryption, device posture checks, and restrictions on administrative access. If remote access is time-bound or tied to specific business scenarios (such as on-call support), document the conditions and approval process.
Align policy to technical enforcement by configuring identity providers, VPN gateways, remote desktop brokers, and firewall rules to support only the approved access paths. This helps reduce ambiguity and supports NIST 800-171 compliance evidence requirements.
Remote Access Authorization Table
| Policy Element | What to Define | Examples | Evidence to Maintain |
|---|---|---|---|
| Approved remote access methods | Which technologies are allowed | VPN, approved secure access portal, managed remote desktop | Policy text, configuration screenshots, method list |
| Authorized users and roles | Who may access remotely and why | Admins, on-call engineers, approved contractors | Role definitions, access approvals, group membership |
| Permitted targets | What systems can be accessed remotely | CUI enclave only; no direct access to sensitive admin interfaces | Network rules, access control lists, diagrams |
| Required safeguards | Security conditions for remote access | MFA, encryption, device management, logging | Conditional access rules, MFA settings, logging outputs |
| Time and scenario restrictions | When remote access is allowed | Business hours only; emergency support with approval | Approval workflow, exception records, review cadence |
Evidence Assessors Commonly Expect
Assessors commonly expect a documented remote access policy and proof that approved remote access methods are enforced technically. They may also review access approvals, role definitions, and configuration settings that restrict remote access to authorized pathways.
Log evidence that remote sessions are monitored and controlled can strengthen audit readiness, especially where remote access is common for administrators or support personnel.
Common Gaps to Avoid
Common gaps include allowing remote access via multiple unmanaged tools, failing to define who is authorized to connect remotely, and relying on informal approvals that are not documented or repeatable.
Another frequent issue is having a policy that allows remote access broadly, but failing to technically restrict access paths to the approved methods.
How Cuick Trac Supports This Objective
Cuick Trac supports remote access governance by promoting clear authorization requirements and controlled remote access pathways for environments that handle CUI.
By maintaining documented standards and enforceable access patterns, organizations can reduce remote access ambiguity and improve audit readiness over time.
FAQ
What does AC.L2-3.1.16[a] require?
It requires organizations to define when remote access to CUI systems is permitted and to document the approved methods, conditions, and authorized roles.
What should a remote access policy specify?
It should specify approved remote access methods, who may use them, what systems can be accessed, and any restrictions such as MFA, device requirements, or time bounds.
What evidence supports compliance for remote access authorization?
Evidence commonly includes a remote access policy, configuration settings for approved methods, access approvals, and logs showing remote access is monitored and controlled.