Fluentftp tls session resumption

1. What is TLS session resumption?
2. How do I disable TLS session resumption in FileZilla?

What is TLS session resumption?

Generally, the TLS session resumption functionality speeds up client reconnections, as no full TLS handshake needs to occur. Instead, a value known from a previous session is used to verify the authenticity of the connection.

How do I disable TLS session resumption in FileZilla?

To resolve the error, you can either deactivate 'Require TLS session resumption on data connection' (from: FileZilla sever options > General Settings > 'FTP over TLS settings' page) or change the FTP engine in the profile to WeOnlyDo (under: Modify profile > FTP page).