I cannot connect to pure-ftpd on a new Perfect Server Debian 10 installation from any of several clients running Filezilla v 3.43 or .42 all of which finction normally with the old server (Deb8) using explicit TLS or plain FTP. The error message is The clients pass the filezilla connection test using FTP and TLS Server & client firewalls are deactivated. I tried CuteFTP. This will connext using FTP but takes over 20 seconds to produce the root file listing. Its TLS connection produces: I have reinstalled Pure-ftpd using the tutorial but with apt-get reinstall, deleting the old cert first but results are the same. Any help/ideas will be gratefully received.