Issue
Enable secure FTP connection on ProFTPd
Fix
apt install proftpd proftpd-mod-crypto
Edit /etc/proftpd/proftpd.conf as follow
PassivePorts 30000 50000
Include /etc/proftpd/tls.conf
Edit /etc/proftpd/tls.conf and set:
TLSEngine on
TLSLog /var/log/proftpd/tls.log
TLSProtocol SSLv23
TLSRSACertificateFile /etc/ssl/star_goline_ch.crt
TLSRSACertificateKeyFile /etc/ssl/star_goline_ch.key
TLSOptions NoCertRequest EnableDiags NoSessionReuseRequired
TLSVerifyClient off
TLSRequired on
Editi/etc/proftpd/modules.conf and set:
LoadModule mod_tls.c