May 29 2017
Determine OS within FTP Session
The “QUOTE” FTP keyword is essential to allow a user to run system-specific commands on servers (eg SITE or ALLO)
Most FTP clients send a NOOP – that actually is a dummy packet – to keep the connection up
ftp> quote noop 200 NOOP ok.
QUOTE SYST returns the Operating System the FTP server runs on, or at least gives you a hint.
Check these 2 examples on Linux Redhat and IBM i, the second giving more details than the first
ftp> quote syst 215 UNIX Type: L8 ftp> quote syst 215 OS/400 is the remote operating system. The TCP/IP version is "V7R1M0".