​A fundamental component of RADIUS is a client's validation of the RADIUS server's identity.This is accomplished by hosting a certificate on the RADIUS server that has been validated by a trusted Certificate Authority (CA).I have a laptop with a Dell D630 with Wi Fi power switch on the side.Because I have a switch to disable the Wifi power, this seemed easier/safer, and it worked. thanks, Solution: remove whatever "preferred networks" are displayed in wireless netwok card's property page, n click ok. happens when u switch to a new router or use a new different SSID.WPA2 is supported as i can connect to WPA2 personal APs. During the connection it flashes that it "connected" for a second then goes to "Validating Identity" which it eventually timesout on.I am using the Windows Wireless Connection Manager. On a couple of occasions I've seen that particular AP (don't know what firmware) suddenly stop attempting to authnenticate clients (it never sends any RADIUS requests) and power-cycling the AP "fixes" the issue.

Always start here, using another Wi-Fi client to determine which is the likely culprit, the network or the client.When status is Connected, tap Advanced to view the client's assigned IP address.Once your Android Wi-Fi client has a valid IP address, use Ping to verify network connectivity.I had been able to connect previously, but the connection would always indicate that it was validating.However, it didnt work, until I disconnected, turned the power off my Wi Fi, unchecked the tab in the authenticate dialog box, clicked ok, then switched the Wi Fi power back on, and reconnected.