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TPM-12.4: External Connectivity Requirements - Identification of Ports, Protocols & Services

TPM 7 — High Identify

Mechanisms exist to require External Service Providers (ESPs) to identify and document the business need for ports, protocols and other services it requires to operate its Technology Assets, Applications and/or Services (TAAS).

Renumbered: Formerly TPM-04.2 in SCF 2025.4.

Control Question: Does the organization require External Service Providers (ESPs) to identify and document the business need for ports, protocols and other services it requires to operate its Technology Assets, Applications and/or Services (TAAS)?

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

Third-Party Management (TPM) domain capabilities are ad hoc and inconsistent. Capability criteria associated with this control may include: ▪ Policies, standards & procedures associated with TPM domain capabilities provide limited coverage due to the depth and breadth of the existing documentation. ▪ Third-party management-related activities are decentralized (e.g., a localized/regionalized function) and uses non-standardized methods to implement secure, resilient and compliant practices. ▪ No centralized inventory of External Service Providers (ESP) is maintained. ▪ ESP are not formally managed according to criticality.

Level 2 — Planned & Tracked

Third-Party Management (TPM) 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 TPM domain capabilities are formally documented and centrally-managed by the entity. ▪ Standardized Operating Procedures (SOP) associated with TPM 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 TPM domain capabilities to address applicable statutory, regulatory and/or contractual requirements for Technology Assets, Applications, Services and/or Data (TAASD). ▪ Third-party management-related controls are primarily administrative and preventative in nature (e.g., policies, standards and procedures & guidelines). ▪ Asset management may be a defined function (e.g., team or department) or assigned as an additional duty to existing IT and/or cybersecurity personnel.

Level 3 — Well Defined

Third-Party Management (TPM) 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 TPM 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 TPM domain capabilities are well-documented and kept current by process owners. ▪ A procurement team, or similar function, is appropriately staffed and supported to implement and maintain TPM domain capabilities. ▪ Technology is leveraged to enhance the efficiency and accuracy of third-party management operations (e.g., TPRM risk management solution and vendor management solution). ▪ 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 TPM 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). ▪ An implemented and operational capability exists to require External Service Providers (ESPs) to identify and document the business need for ports, protocols and other services it requires to operate its Technology Assets, Applications and/or Services (TAAS).

Level 4 — Quantitatively Controlled

Third-Party Management (TPM) 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. TPM-12.4_A01 external system services that require the identification of functions, ports, protocols and other services are defined.
  2. TPM-12.4_A02 providers of external system services are required to identify the functions, ports, protocols and other services required for the use of such services.

Technology Recommendations

Micro/Small

  • Cybersecurity Supply Chain Risk Management (C-SCRM) program
  • Data Protection Impact Assessment (DPIA)

Small

  • Cybersecurity Supply Chain Risk Management (C-SCRM) program
  • Data Protection Impact Assessment (DPIA)

Medium

  • Cybersecurity Supply Chain Risk Management (C-SCRM) program
  • Data Protection Impact Assessment (DPIA)

Large

  • Cybersecurity Supply Chain Risk Management (C-SCRM) program
  • Data Protection Impact Assessment (DPIA)

Enterprise

  • Cybersecurity Supply Chain Risk Management (C-SCRM) program
  • Data Protection Impact Assessment (DPIA)

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