Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
curl
krb
<level>
Enable Kerberos with security <level>
FTP
Kerberos
ftp
7.3
single
delegation
ssl
--krb clear ftp://example.com/
--krb
Enable Kerberos authentication and use. The level must be entered and should
be one of 'clear', 'safe', 'confidential', or 'private'. Should you use a
level that is not one of these, 'private' is used.