Due to several known issues, we do not yet recommend FortiOS 6.2 in productive environments.«FortiOS 6.2: Upgrade Notes» weiterlesen
Recently we have had a few support cases where a customer was unable to log in to the firewall via WebUI after the firmware update. But SSH access worked fine.
It turned out that during the update process the server certificate used for the WebUI is lost.
Config with v6.0.4 (it does not happen with «self-signed» only):
config system global«What’s new with FortiOS 6.2/6.0.8: Update issue with certificate for WebUI» weiterlesen
set admin-server-cert "self-signed"
Last week Fortinet has released a critical PSIRT-Advisory «Improper check for certificate revocation vulnerability»
Unfortunately the article does not give exact information regarding the background or the solution and we couldn’t find further information about the issue, either. Maybe you have more information?«New PSIRT-Advisory from Fortinet» weiterlesen