WU-FTPD 2.6.1 release notes (July 2010)

FTP_SSL_DEBUG_MODE Specifies if the SSL features must be invoked
in debug mode. If the debug mode is set to 2,
extended logging is performed.
FTP_SSL_NOFALLBACK Specifies if SSL fallback needs to be enabled.
By default, fallback is enabled.
FTP_SSL_PROT Specifies whether the data channel encryption
is enabled. By default, it is enabled.
FTP_SSL_RANDFILE Specifies the file used for seeding random
number generator.
FTP_SSL_LOGFILE Specifies the logfile for the debug mode.
FTP_SSL_CONFIG_FILE Specifies the file that contains the
configuration options related to TLS.
FTP_SSL_CERT_FILE Specifies the location of the client's certificate
file.
FTP_SSL_DSACERT_FILE Specifies the location of the client's DSA
certificate file.
FTP_SSL_KEYT_FILE Specifies the client's key file.
FTP_SSL_DSAKEY_FILE Specifies the location of the client's DSA Key
file.
FTP_SSL_CIPHER Specifies the cipher list.
FTP_SSL_CA_FILE Specifies the CA certificate.
FTP_SSL_CA_PATH Specifies the pathname for CA certificate.
FTP_SSL_CRL_FILE Specifies the CRL file location for the FTP
client.
FTP_SSL_CRL_PATH Specifies the CRL file pathname.
FTP_TLS_PASSWD Specifies the password to decrypt the PEM
key file(s).
NOTE: For information on the default values, see the ftp(1) manpage.
Alternatively, you can also create a script that contains all the export
commands and another script that contains all the unset commands:
Following are sample entries in a script that contains the export commands:
FTP_USESSL=1
FTP_SSL_MODE=secure
FTP_SSL_VERIFY_MODE=1
FTP_SSL_DEBUG_MODE=2
FTP_SSL_NOFALLBACK=1
FTP_SSL_PROT=1
FTP_SSL_FILE_MODE=pem
WU-FTPD 2.6.1 Features 21