Troubleshooting Tip: How to resolve FDN connection or download failure

[pchee]

Description	This article describes how to resolve 'FDN connection or download failure'.
Scope	FortiSandbox.
Solution	Go under System -> FortiGuard -> FortiGuard Server Settings. Select the check box and use the override FDN server to download module updates (IP or FQDN). Use putty to SSH into the FortiSandbox Console: Perform the CLI command: test-network Make sure the FortiSandbox can reach out to the FDN service, refer to the Access_Control_List table for the default servers and ports used. Perform the CLI command: diagnose-debug fdn Notice that the FortiSandbox is reaching out to the FortiGuard server for an update. Check again on the webUI and make sure the Status is showing Already Up-to-date or Successful with the latest update time.