Certificate errors after applying 6.4.9

Hi,

how about to start also with WHAT error do you see?
What is intermittent by your means .. once a year, month, hour ?
Some details on cert like used ciphers and also if signing CA cert was imported to FortiGate.

I wasn't asking for help to narrow it down. I was asking if anyone has seen certificate errors when connecting using SSL VPN after moving to 6.4.9. Obviously you haven't.

We only switched to 6.4.9 ten days ago and I've seen three or four errors but the most common is a -11 (The server you want to connect to requests identification, please choose a certificate and try again)

Except there is a validate certificate chosen. And since it actually works the second or third time it's tried, the firewall thinks it's valid too.

It's just an OpenSSL certificate that I've used since Nov 2020 without a problem and doesn't expire for another 3 years. 

My focus is elsewhere at the moment, so I was hoping to find out if this a problem for us only or more general. 

Having the same issue. We don't even use certificate authentication, but it's asking for a certificate now. Only certain users are experiencing this problem. I am not one of them.

Same problem here after upgrading from 6.0.14 -> 6.2.10 -> 6.4.8 -> 6.4.9 a few days ago. In our case the error is with Forticlient 6.0.9 and we are using the default Fortinet certificate. It ends up connecting the second or third time it's tried. Only reported by 2 or 3 users but probably happening to more but they don´t complain if they are able to connect after retry...

Never did figure it out, but after upgrading to 7.0.6 two weeks ago I haven't seen the error.

Sorry, yes, I mean FortiOS. I had tried four different 7.X FortiClient versions and it made no difference.