FTP
PASV
RETR
# Server-side
REPLY PASS 633 XXXXXXXXXXXXXXXX
# Client-side
ftp
FTP with 633 response to auth
ftp://%HOSTIP:%FTPPORT/%TESTNUMBER
# Verify data after the test has been "shot"
USER anonymous
PASS ftp@example.com
# 67 == CURLE_LOGIN_DENIED
67