ISO 27001:2022 · Technological controls
ISO 27001:2022 8.21: Security of network services
ISO 27001:2022 8.21 covers Security of network services. The held text names 5 evidence records for it, the first being Statement of Applicability entry for control A.8.21, showing inclusion or justified exclusion, implementation status and the risks it.... The common gap an assessor flags is Network service contracts specify bandwidth and uptime but no security requirements.
For each network service, the organization is to identify, put in place and monitor the security mechanisms, the service levels and the requirements that apply. Purpose (stated in ISO/IEC 27002:2022): keeps the use of network services secure. As an Annex A reference control, it is compared with the controls determined in risk treatment (6.1.3 c) and recorded in the Statement of Applicability as included or excluded, with the justification and implementation status (6.1.3 d); implementation guidance is ISO/IEC 27002:2022 8.21.
What evidence supports 8.21?
- Annex A technological controlStatement of Applicability entry for control A.8.21, showing inclusion or justified exclusion, implementation status and the risks it treats
- Annex A technological controlService agreements with internal and external network providers specifying security features, service levels and requirements
- Annex A technological controlRight-to-audit clauses and third-party attestations from network and managed security service providers, with records of review
- Annex A technological controlMonitoring reports on provider performance against agreed security and service levels
- Annex A technological controlDocumented rules on permitted networks and services, authentication, authorization, means of access (VPN, wireless) and contextual conditions
Where this requirement comes from
This is our own statement of ISO 27001:2022 8.21, read from the copy we hold (licensed complete copy) and stated in our words, not the standard verbatim. The framework as we hold it.
Common gaps an assessor flags
- Network service contracts specify bandwidth and uptime but no security requirements
- Managed security providers are never audited and attestation reports are not reviewed
- No rules define which networks users may connect to or how
- CDN caching settings expose confidential content
How it maps to SOC 2
No reviewed link is held for this control.
A link is a topical overlap with a confidence and a reason. It does not establish that meeting one requirement satisfies the other, and it is not certification.