The title pretty says it all. I have the layer 3 webauth enabled on a Cisco WLC 2504 WLAN with a self-signed SSL cert. I installed the root CA cert in the Android phone under Settings > Biometrics and security > Other security settings > Install from device storage for both "VPN and apps" and "Wi-Fi". When I connect to the Wi-Fi and I get redirected to the captive portal, I get this error:
SSL certificate not trusted
The security certificate for this network is not from a trusted authority. We do not recommend that you connect to this network.
Buttons: Cancel / Connect
I verified that the certificate was installed okay because if I connect to a different Wi-Fi without the layer 3 webauth and open up Google Chrome and go to a different website that chains up to the same cert I trusted, I see a green lock icon an don't get any certificate warnings.
My Android device is a Samsung Galaxy S8 running Android 9, kernel 4.4.153.
Thanks for reading my post and for your response. If I go to https://my-configured-hostname.com in a browser, I don't get any warnings.
I also changed my virtual IP address from 184.108.40.206 to 192.168.x.x, and the warning is still coming up. Thanks for all the suggestions so far!