ISO/IEC 27001:2022 · Technological control
ISO 27001 Annex A 8.22: Segregation of networks
Quick answer
ISO 27001 Annex A 8.22 (Segregation of networks) is a technological control. Separate groups of information services, users and systems on the network.
What auditors look for
Auditors check that 8.22 is either justified as not applicable in your Statement of Applicability or implemented and working. Typical evidence includes:
- Network segmentation design
- Firewall rules between segments
- Segmentation tests
How to implement 8.22 in practice
- Separate guest, user, server and management networks
- Isolate legacy systems
- Test that segmentation works
- Name an owner for 8.22, decide how often it runs and file evidence each time, so the control is audit-ready all year.
Recording 8.22 in the Statement of Applicability
List 8.22 with whether it applies, the reason (usually the risks it treats or a legal or contractual requirement), its implementation status and where the evidence lives. If you exclude it, explain why none of your risks or obligations require it.