Certificate authentication error

Hi all,

I have a problem when setting up authentication via certificate.

We operate with a root certification authority which signs an intermediate certification authority.

It is then this intermediate CA which is imported into Fortigate and which signs the client certificates.

When I import the intermediate CA on the fortigate and I connect via a client certificate signed by this same authority, it works.

However, when restarting the firewall, the ERR_BAD_SSL_CLIENT_AUTH_CERT error occurs.

Unable to reconnect with the certificate that was working before reboot.

If I import the root CA and connect with a client certificate signed by that authority, it works even after a reboot.

I conclude that the problem is with the intermediate CA but I cannot put my finger on what is wrong.

Has anyone ever had the problem?

For information, I am on a 50E in 5.6.13. But I did the same tests on other versions and other models. The problem is the same.

Thank you for your help.