FTP
This module contains all vendor crawlers of FTP implementations. Available crawlers include:
FTP_Command
FTP Commands *
FTP_ReturnCode
FTP Return Codes †
https://www.iana.org/assignments/ftp-commands-extensions/ftp-commands-extensions.xhtml#ftp-commands-extensions-2
https://en.wikipedia.org/wiki/List_of_FTP_server_return_codes
TCP
HTTP