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NET-07: Out-of-Band Channels

NET 9 — Critical Protect

Mechanisms exist to utilize out-of-band channels for the electronic transmission of information and/or the physical shipment of system components or devices to authorized individuals.

Renumbered: Formerly NET-11 in SCF 2025.4.

Code reused: In SCF 2025.4 and earlier, NET-07 was Network Connection Termination. That control is now NET-28.

Control Question: Does the organization utilize out-of-band channels for the electronic transmission of information and/or the physical shipment of system components or devices to authorized individuals?

General (9)
Framework Mapping Values
CSA IoT SCF 2 SWS-09
MITRE ATT&CK 16 T1071 T1071.001 T1071.002 T1071.003 T1071.004 T1114 T1114.001 T1114.002 T1114.003 T1213 T1213.005 T1489
NIST 800-53 R4 SC-37 SC-37(1)
NIST 800-53 R5.2 SC-37 SC-37(01)
NIST 800-82 R3 SC-37 SC-37(01)
NIST 800-160 Vol2 R1 SC-37
NIST 800-161 R1 SC-37 SC-37(1)
NIST 800-161 R1 Level 2 SC-37(1)
NIST 800-161 R1 Level 3 SC-37(1)

Capability Maturity Model

Level 0 — Not Performed

Practices are non-existent, based on the inability to demonstrate an implemented and operational capability. A reasonable person would conclude the control is not being performed.

Level 1 — Performed Informally

Network Security (NET) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with NET domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Network security-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices.

Level 2 — Planned & Tracked

Network Security (NET) capabilities are requirements-driven, but are not standardized across the entity (e.g., local/regional level consistency). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are documented and maintained by process owners. ▪ IT and/or cybersecurity personnel work with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Network security-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Network security management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel. ▪ IT personnel define secure networking practices to protect the Confidentiality, Integrity, Availability and Safety (CIAS) of the organization's TAASD. ▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies.

Level 3 — Well Defined

Network Security (NET) capabilities are standardized across the entity for applicability to People, Processes, Technologies, Data and/or Facilities (PPTDF) to ensure consistency for Technology Assets, Applications, Services and/or Data (TAASD). Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Policies and standards associated with NET domain capabilities are formally documented and centrally-managed by the entity's Governance, Risk & Compliance (GRC) team, or similar function. ▪ Standardized Operating Procedures (SOP) associated with NET domain capabilities are well-documented and kept current by process owners. ▪ A network security management team, or similar function, is appropriately staffed and supported to implement and maintain NET domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of network security operations (e.g., network management solution and log aggregator). ▪ The entity's Governance, Risk & Compliance (GRC) team, or similar function, works with business stakeholders and process owners to appropriately scope and reasonably implement cybersecurity and data protection controls associated with NET domain capabilities to address Minimum Compliance Requirements (MCR) (e.g., applicable statutory, regulatory and/or contractual requirements) and Discretionary Security Requirements (DSR) (e.g., entity-required controls). ▪ Secure Baseline Configurations (SBC) enforce the principles of least privileges and least functionality for boundary protection technologies. ▪ An implemented and operational capability exists to utilize out-of-band channels for the electronic transmission of information and/or the physical shipment of system components or devices to authorized individuals.

Level 4 — Quantitatively Controlled

Network Security (NET) capabilities, in addition to being standardized across the entity and centrally managed to ensure consistency across Technology Assets, Applications, Services and/or Data (TAASD), efforts are metrics driven to provide sufficient insight for decision makers to predict optimal performance, ensure continued operations and/or identify areas for improvement. Capability criteria associated with this control reasonably expect the following criteria to exist: ▪ Applicable SCR-CMM Level 3 (Well Defined) capabilities are implemented and operational. ▪ Metrics reporting includes quantitative analysis of Key Performance Indicators (KPIs). ▪ Metrics reporting includes quantitative analysis of Key Risk Indicators (KRIs). ▪ Scope of metrics, KPIs and KRIs covers organization-wide cybersecurity and data protection controls, including functions performed by third-parties. ▪ Organizational leadership maintains a formal process to objectively review and respond to metrics, KPIs and KRIs (e.g., monthly or quarterly review). ▪ Based on metrics analysis, process improvement recommendations are submitted for review and are handled in accordance with change control processes. ▪ Business and technical stakeholders are involved in reviewing and approving proposed changes to evolve capabilities.

Level 5 — Continuously Improving

Utilize SCR-CMM Level 3 or Level 4 (if available) criteria definitions: ▪ There are no defined Level 5 criteria, since it is reasonable to assume a continuously-improving process is not necessary to operationalize this control. ▪ Level 5 capabilities should be considered “world-class” where the control builds on Level 4 capabilities, but are continuously improving through Artificial Intelligence (AI) and/or Machine Learning (ML) technologies. ▪ While it may be possible to develop responsive capabilities for this control through the use of AI and/or ML technologies, the criteria would be organization-specific to define.

Assessment Objectives

  1. NET-07_A01 out-of-band channels to be employed for the physical delivery or electronic transmission of information, system components or devices to individuals or the system are defined.
  2. NET-07_A02 out-of-band channels are employed for the physical delivery or electronic transmission of information, system components or devices to individuals or systems.
  3. NET-07_A03 information, system components or devices to employ out-of-band-channels for physical delivery or electronic transmission are defined.
  4. NET-07_A04 individuals or systems to which physical delivery or electronic transmission of information, system components or devices is to be achieved via the employment of out-of-band channels are defined.
  5. NET-07_A05 controls to be employed to ensure that only designated individuals or systems receive specific information, system components or devices are defined.
  6. NET-07_A06 individuals or systems designated to receive specific information, system components or devices are defined.
  7. NET-07_A07 information, system components or devices that only individuals or systems are designated to receive are defined.
  8. NET-07_A08 organization-defined controls are employed to ensure that only authorized individuals or systems receive information, system components or devices.

Technology Recommendations

Micro/Small

  • Use a separate channel (e.g., phone call) for critical communications

Small

  • Out-of-band communication policy for critical operations

Medium

  • Formal out-of-band channel for management and security communications
  • OOB procedure

Large

  • Dedicated out-of-band management channel
  • OOB network for critical operations

Enterprise

  • Enterprise out-of-band management network (OOBM)
  • Dedicated OOB access for critical systems
  • Emergency communication protocols

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