my $sftp = Net::FTPSSL->new(
    '******',
    Debug => 1,
    Timeout => 60,
) or die 'Fehler in '.__LINE__;
$sftp->login('*****','*****') or die 'Fehler in '.__LINE__;
my $hash_ref = $sftp->list() or die 'Fehler in '.__LINE__;
print "\$hash_ref = '$hash_ref'\n";

Net-FTPSSL Version: 0.26

Perl: 5.016003  [5.16.3],  OS: MSWin32

Server (port): ***** (21)

Keys: (Debug), (Timeout)
Values: (1), (60)

SKT <<< 220 FTP on ***** ready
SKT >>> AUTH TLS
SKT <<< 234 AUTH TLS successful

Object Net::FTPSSL Details ... (*****:21 - E)
  Croak ==> (undef)
  Crypt ==> E
  FixGetTs ==> 0
  FixPutTs ==> 0
  Host ==> *****
  OverridePASV ==> (undef)
  Pret ==> 0
  Timeout ==> 60
  _SSL_arguments ==> HASH(0x32121f4)
        -- PeerAddr ===> *****
        -- PeerPort ===> 21
        -- Proto ===> tcp
        -- SSL_cert_file ===> certs/client-cert.pem
        -- SSL_check_crl ===> 0
        -- SSL_cipher_list ===> ALL:!LOW
        -- SSL_honor_cipher_order ===> 0
        -- SSL_key_file ===> certs/client-key.pem
        -- SSL_server ===> 0
        -- SSL_use_cert ===> 0
        -- SSL_verify_mode ===> 0
        -- SSL_version ===> TLSv1
  _SSL_ctx ==> IO::Socket::SSL::SSL_Context=HASH(0x32122f4)
        -- context ===> 46005552
  _SSL_fileno ==> 3
  _SSL_ioclass_upgraded ==> IO::Socket::INET
  _SSL_last_err ==> SSL wants a read first
  _SSL_object ==> 41446584
  _SSL_opened ==> 1
  buf_size ==> 10240
  data_prot ==> P
  dcsc_mode ==> 1
  debug ==> 1
  debug_extra ==> 0
  io_sock_nonblocking ==> 0
  io_socket_domain ==> 2
  io_socket_proto ==> 6
  io_socket_timeout ==> 60
  io_socket_type ==> 1
  last_ftp_msg ==> 234 AUTH TLS successful
  mySocketOpts ==> HASH(0x2b99af4)
        -- PeerAddr ===> *****
        -- PeerPort ===> 21
        -- Proto ===> tcp
        -- Timeout ===> 60
  trace ==> 0
  type ==> A

>>> USER +++++++
<<< 331 Password required for <++++++>
>>> PASS *******
<<< 230 User <++++++> logged in
>>> HELP
<<< 214-The following commands are recognized (* =>'s unimplemented):
<<<  CWD     XCWD    CDUP    XCUP    SMNT*   QUIT    PORT    PASV
<<<  EPRT    EPSV    ALLO*   RNFR    RNTO    DELE    MDTM    RMD
<<<  XRMD    MKD     XMKD    PWD     XPWD    SIZE    SYST    HELP
<<<  NOOP    FEAT    OPTS    AUTH    CCC*    CONF*   ENC*    MIC*
<<<  PBSZ    PROT    TYPE    STRU    MODE    RETR    STOR    STOU
<<<  APPE    REST    ABOR    USER    PASS    ACCT*   REIN*   LIST
<<<  NLST    STAT    SITE    MLSD    MLST
<<< 214 Direct comments to root@*****
>>> FEAT
<<< 211-Features:
<<<  MDTM
<<<  MFMT
<<<  TVFS
<<<  AUTH TLS
<<<  MFF modify;UNIX.group;UNIX.mode;
<<<  MLST modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*;
<<<  PBSZ
<<<  PROT
<<<  REST STREAM
<<<  SIZE
<<< 211 End
<<+ 214 The HELP command is supported.
>>> PBSZ 0
<<< 200 PBSZ 0 successful
>>> PROT P
<<< 200 Protection set to Private
>>> PASV
<<< 227 Entering Passive Mode (85,13,151,219,196,106).
--- Host (*****)  Port (50282)
>>> LIST
<<< 150 Opening ASCII mode data connection for file list
<<< 226 Transfer complete
$hash_ref = '13'