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:
Ensure that FortiWeb can access the Internet using TCP Port 443, DNS, and disable SSL inspection on the FortiWeb appliance.
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 the 3rd step is OK, but the problem persists, collect the information below and create a ticket for the TAC Engineers: Support.
diagnose system update log diagnose system update servers get system autoupdate tunneling
