Wireless validating identiy
A fundamental component of RADIUS is a client's validation of the RADIUS server's identity.
For troubleshooting purposes, server certificate validation can be disabled on one or multiple clients, allowing those clients to connect regardless of the certificate in use.
If you are trying to connect to the 5GHz wifi, there will be a 5g after the last 3 of the routers MAC address.
Note: If your router has multiple ethernet ports, DO NOT use the WAN port to connect a computer.
(I tried TKIP later, when this didn't work, with the same results as described below.) So I set it to WPA-PSK / AES and entered my security key.
It's mixed letters and numbers, 32 characters long. Still "waiting for reply" in the main screen, and "cannot find certificate" on the pop-up.
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This means that you will have to disconnect (unplug) the cellular modem (aircard) from the computer and close the cellular connection manager tool provided by your cellular carrier or, disconnect from any LAN (wired Ethernet) or Wi-Fi (wireless) connections before you will be able to connect your computer to the router either by Ethernet cable or Wi-Fi.