Certificate untrusted ISE sporsorportal

[SupportAC]

Hi,

We have a sponsorportal for wifi in ISE. 2. Suddenly the certificate started to be untrusted. when user goes to this portal receive the error about "non trusted certificate", going to the certificate looks OK. I attach the screenshots, what is causing this error:

[hslai · Accepted solution]

I noticed your certificate issued by Symantec, so it's likely related to Distrust of Symantec TLS Certificates | Mozilla Security Blog, which says,

... 

• October 2018 (Firefox 63): Distrust of Symantec root certificates for website server TLS authentication.

...