This article describes how to troubleshoot the log Message 'Unable to connect to FDS servers'.
Scope
FortiWeb
Solution
Important: Check the connectivity to the FortiWeb(s) and if there are still issues connecting to the FDS server:
Verify the FortiWeb's access to the Internet via TCP Port 443, DNS.
Ensure the time zone set on the FortiWeb is correct.
Test connectivity for the FortiGuard Services by executing the following commands:
execute ping service.fortiguard.net execute traceroute service.fortiguard.net execute ping fds1.fortinet.com execute traceroute fds1.fortinet.com diagnose network route list diagnose network ip list diagnose system update info
Verify if the latest error is caused by connectivity/update failure
If 3rd step is OK, but the problem persists collect the below information and create a ticket to the TAC Engineers
diagnose system update log diagnose system update servers get system autoupdate tunneling
