CMMC Practice Number: AC.L2-3.1.14
CMMC Level: 2 CMMC Domain: Access Control (AC)
Practice Summary:
Route remote access via managed access control points.
Contents:
CMMC Practice Implementation |
Assessment Objectives
Determine if:
[a] managed access control points are identified and implemented; and
[b] remote access is routed through managed network access control points.
Practice Clarification (DOD, CMU)
The contractor can route all remote access through a limited number of remote access control points to reduce the attack surface and simplify network management [a,b]. This allows for better monitoring and control of the remote connections.
This practice, AC.L2-3.1.14, limits remote access to specific access control points and complements five other practices dealing with remote access (AC.L2-3.1.12, AC.L2-3.1.13, AC.L2-3.1.15, IA.L2-3.5.3, and MA.L2-3.7.5):
- AC.L2-3.1.12 requires the control of remote access sessions.
- AC.L2-3.1.13 requires the use of cryptographic mechanisms when enabling remote sessions.
- AC.L2-3.1.15 requires authorization for privileged commands executed during a remote session.
- IA.L2-3.5.3 requires multifactor authentication for network access to non-privileged accounts.
- Finally, MA.L2-3.7.5 requires the addition of multifactor authentication for remote maintenance sessions.
Example
You are a system administrator for a company with many locations, and several employees at different locations need to connect to the organization’s networks while working remotely. Because each company location has a direct connection to headquarters, you decide to route all remote access through the headquarters location [a]. All remote traffic is routed through a single location to simplify monitoring [b].
Potential Assessment Considerations
• How many managed access control points are implemented [a]?
• Is all remote access routed through the managed access control points [b]?
Where To Look
- Access control policy;
- procedures addressing remote access to the system;
- system security plan;
- system design documentation;
- list of all managed network access control points;
- system configuration settings and associated documentation;
- system audit logs and records;
- other relevant documents or records.
Who To Talk To
- System or network administrators;
- personnel with information security responsibilities.
Perform Test On
- Mechanisms routing all remote accesses through managed network access control points.
Additional Information
Companies should identify and fully define the number of managed network access control points used for remote accesses are routed. All remote access to the system should be routed through these company’s managed network access control points.
CMMC Practice Background and References (DOD, CMU) |
Practice Discussion:
DISCUSSION FROM SOURCE: DRAFT NIST SP 800-171 R2
Routing remote access through managed access control points enhances explicit, organizational control over such connections, reducing the susceptibility to unauthorized access to organizational systems resulting in the unauthorized disclosure of CUI
CMMC References:
· NIST SP 800-171 Rev 1 3.1.14
· CIS Controls v7.1 15.5, 15.10
· NIST CSF v1.1 PR.AC-3, PR.PT-4
· CERT RMM v1.2 TM:SG2.SP2
· NIST SP 800-53 Rev 4 AC-17(3)