telnet

The telnet identity: Telnet Protocol. Every field and what is required.

telnet is the Telnet protocol (RFC 854). The target is host:port (default 23). 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

telnet uses the byte-session fields from tcp:

field	required	what it does
`send`	yes	the bytes to send, as hex or `hex "text"`; empty when a step only reads
`recv`		how many bytes to read at most
`recv_until`		stop reading once this hex marker appears
`timeout`		how long to wait, in seconds
`close`		end the session after this step
`capture`		pull a value out of the received hex for later steps

Example

telnet banner
  meaning: read the device banner
  recv: 4096
  timeout: 5
  assert: contains "fffd"

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.

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