forigate 81f Certificate applied but still showing Not Secure

[Saltywaffles]

Hello,

Recently got an 81f installed and I generated a Certificate and applied it to the Fortigate Administrative, users, and VPN settings, but when I connect to the Fortigate, I still get the Not Secure warning on any browser (Edge, Google, Firefox).  When I check the certificate on Chrome, it shows that it is not a valid certificate and that it was generated from Let's Encrypt and shows the generated date, and expiration date.  Any ideas on where to look for troubleshooting this issue?

I am running on Firmware 7.0.9 if that matters.

Thanks!

[gfleming · Accepted solution]

Are you using IP address or host name to connect to the FortiGate? Does that match the CN or SAN of the cert?

[Saltywaffles]

I am connecting to the FortiGate with the IP Address.  I just tried connecting with the FQDN and it worked...well, I feel silly.  Thanks for pointing me in the right direction!