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About the RADIUS Service for macOS Server
RADIUS is included in macOS Server, but it isn’t listed as a separate service in the Server app.
In macOS Server, RADIUS is off by default.
Turn on RADIUS for macOS Server
In the Server app, select the AirPort device used as your Internet router from the sidebar.
Choose "Require user name and password login over Wi-FI".
The Server app starts RADIUS on your server, registers the selected Apple wireless device with RADIUS, and authorizes all user accounts on the server (including users from connected external directories) to access your wireless network. All connections use the server's default SSL certificate.
Customize RADIUS settings
RADIUS settings can be customized using the radiusconfig command. To learn more about customization, run the man radiusconfig command in Terminal.
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