We have a controller which is having an issue with certificates on Captive Portal - hosted on the controller itself.
When connecting via Windows IE the CP page comes up fine (initially gets the "there is a problem with the website's security" message but able to proceed and log in.
However connecting with Android devices (Google Chrome and Firefox browser) they get the message "The indentity of this website has not been verified - Server's certificate is not trusted".
To me, that seems to that the certificate isn't authorised by a CA in the browser, rather than an issue with the controller itself?
I've checked the cert and it is in date, and the CN matches the controller DNS name.