On Allow fallback to plain FTP:
Status: Connected, waiting for welcome message...
Reply: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
Reply: 220-You are user number 6 of 50 allowed.
Reply: 220-Local time is now 13:59. Server port: 21.
Reply: 220-This is a private system - No anonymous login
Reply: 220-IPv6 connections are also welcome on this server.
Reply: 220 You will be disconnected after 15 minutes of inactivity.
Command: CLNT
https://ftptest.net on behalf of xx.xx.xx.xx
Reply: 530 You aren't logged in
Command: AUTH TLS
Reply: 500 This security scheme is not implemented
Warning: Server refused AUTH TLS, trying deprecated AUTH SSL fallback.
Command: AUTH SSL
Reply: 500 This security scheme is not implemented
Warning: Server refused AUTH SSL, falling back to insecure plaintext FTP.
Command: USER Mathis
Reply: 331 User Mathis OK. Password required
Command: PASS ******
Reply: 230 OK. Current directory is /
Command: SYST
Reply: 215 UNIX Type: L8
Command: FEAT
Reply: 211-Extensions supported:
Reply: EPRT
Reply: IDLE
Reply: MDTM
Reply: SIZE
Reply: MFMT
Reply: REST STREAM
Reply: MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
Reply: MLSD
Reply: AUTH TLS
Reply: PBSZ
Reply: PROT
Reply: UTF8
Reply: TVFS
Reply: ESTA
Reply: PASV
Reply: EPSV
Reply: SPSV
Reply: ESTP
Reply: 211 End.
Command: PWD
Reply: 257 "/" is your current location
Status: Current path is /
Command: TYPE I
Reply: 200 TYPE is now 8-bit binary
Command: PASV
Reply: 227 Entering Passive Mode (xxx,xx,xxx,xxx,143,253)
Command: MLSD
Error: Connection timed out