Ftp> put upload.txt ../ftp_server/ local: upload.txt remote: ../ftp_server/ 500 Illegal PORT command. ftp: bind: Address already in use

Getting error
ftp> put upload.txt …/ftp_server/
local: upload.txt remote: …/ftp_server/
500 Illegal PORT command.
ftp: bind: Address already in use

See this link for reference.

use ftp -p command. this work for you