Wi-Fi access is approved before any device is allowed to connect.
What it actually means
Before a device joins a wireless network that can reach CUI, that access has to be explicitly authorized. You define which wireless networks and devices are permitted, approve them, and prohibit everything else — no rogue access points, no unmanaged devices hopping on.
Pass or fail — an assessor needs a "yes" to each
- Permitted wireless networks and devices are documented and approved.
- Unauthorized wireless connections are blocked or prohibited by policy + technical control.
- An owner approves wireless access before it's granted.
What to have ready
- Wireless authorization policy + approved-device list
- Wireless controller / NAC configuration
- Rogue-AP detection if used
Where teams trip up
- Open or unmanaged Wi-Fi that can reach CUI
- No record of which wireless is approved
- Personal devices joining the CUI wireless
Not Applicable only if no wireless networking is used for CUI — document it and prohibit enabling wireless without a change and reassessment.
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3.1.17 — Wireless also has to be authenticated + encrypted3.1.18 — Control which mobile devices connect
More in Access Control (3.1)
3.1.1 — Limit who (and what) can get in3.1.2 — Limit what users can do3.1.3 — Control the flow of CUI3.1.4 — Separate duties3.1.5 — Least privilege (especially for admins)3.1.6 — Use non-privileged accounts for routine work3.1.7 — Restrict and log privileged functions3.1.8 — Limit failed logons3.1.9 — Show privacy and security notices3.1.10 — Lock idle screens3.1.11 — End sessions automatically3.1.12 — Monitor and control remote access3.1.13 — Encrypt remote access sessions3.1.14 — Funnel remote access through managed points3.1.15 — Authorize privileged remote actions3.1.17 — Protect wireless with authentication + encryption3.1.18 — Control mobile device connections3.1.19 — Encrypt CUI on mobile devices3.1.20 — Control connections to external systems3.1.21 — Limit portable storage on external systems3.1.22 — Control what goes on public systems