FileZilla Forums

hello
when i use Filezilla client for FTP over TLS module，warning unknown certificate。But i used trust CA certificate（Globalsign CA），a complete certificate chain has been configured in vsftp。So，what causes this problem。I posted a picture of the problem。
Looking forward to your reply。
Thanks you。

By default, FileZilla employs the TOFU principle (Trust On First Use). That means it does not use the OS trust store but asks the user to confirm the cert is safe.

If you want to trust valid CA certs, you need to check the "Use system trust store" checkbox in the FileZilla settings.

You saved me a lot of trouble。
Thank you ！