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ftp

The ftp identity: File Transfer Protocol. Every field and what is required.

ftp is the File Transfer Protocol (RFC 959). The target is host:port (default 21). The step sends and receives raw bytes as hex, and the session persists across steps, so a solution can stage an exchange and continue it.

Fields

ftp uses the byte-session fields from tcp:

fieldrequiredwhat it does
sendyesthe bytes to send, as hex or hex "text"; empty when a step only reads
recvhow many bytes to read at most
recv_untilstop reading once this hex marker appears
timeouthow long to wait, in seconds
closeend the session after this step
capturepull a value out of the received hex for later steps

Example

ftp banner
  meaning: read the FTP welcome banner
  recv: 4096
  timeout: 5
  assert: contains "323230"

Write attacks down. Verify them.

Download the binary, point it at a target you own, and get a verified result. The corpus is open and the format is plain text.