Canon i-SENSYS MF244dw - Manual (Page 360)

● Check whether [Login Name] is set correctly.
● Check whether the [Use TLS], [Use TTLS], or [Use PEAP] check box is selected.
● If using TLS, check whether a key pair is registered.
● If using TTLS or PEAP, check whether a user name and password are set correctly.
Configuring IEEE 802.1X Authentication(P. 251)
Troubleshooting
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