topic Re: Thumbprint Pop Up While connecting to Wifi in Network Access Control

Thumbprint Pop Up While connecting to Wifi

rockysandhu — Thu, 09 May 2019 23:46:15 GMT

We are having issue while connecting to Wifi. We are using cisco ise for authentication.

While connecting to wifi it pop up and says "thumbprint server xxxxxxxxxxxxxxx" and when we click on connect again its connected. This issue is happening on random users.

In LAN we dont see this pop up.

Any suggestion ?

Re: Thumbprint Pop Up While connecting to Wifi

howon — Fri, 10 May 2019 01:08:22 GMT

Which version of Windows are you seeing this? If I have to guess, you may have more than one RADIUS server with different EAP certificate and whenever user connects to one of the wireless network served by WLC using initial RADIUS server moves to the wireless network serviced by different WLC using different RADIUS server Windows supplicant may be complaining that the RADIUS server certificate doesn't match even though the SSID name is same as before. If that is the case, one fix would be to use identical certificate on all RADIUS servers.

Re: Thumbprint Pop Up While connecting to Wifi

rockysandhu — Fri, 10 May 2019 01:28:05 GMT

We are using windows 10 and this error suddenly started.

Yeah you are right we have two Radius with different-2 certificates.

Re: Thumbprint Pop Up While connecting to Wifi

rockysandhu — Fri, 10 May 2019 02:24:04 GMT

we tried removing one Radius from HA, now all clients are pointed to only one radius but still same error.

Re: Thumbprint Pop Up While connecting to Wifi

howon — Fri, 10 May 2019 03:43:22 GMT

I would validate the thumbprint values users are getting to the certificates that you are using on the two servers to see if it is one of your own. If not, I would investigate to see if there is a mis-configuration or possible rogue AP broadcasting the same SSID.

Re: Thumbprint Pop Up While connecting to Wifi

Jason Kunst — Fri, 10 May 2019 11:20:10 GMT

Have you removed extra certs from the endpoints? Clients will ask the user which credentials to use if they have multiple to offer

Re: Thumbprint Pop Up While connecting to Wifi

hslai — Fri, 17 May 2019 03:28:49 GMT

Take a look at these posts:

WLAN WPA2 Enterprise - Certificate Message - No AutoConnect

Certificate issues with RADIUS connection on W10 clients