what tcp port is sftp or secure file transfer protocol commonly used on?
Basically, there are the following file transfer protocols around: FTP â the plain old FTP protocol that has been around since 1970s. The acronym stands for File Transfer Protocol. It usually runs over TCP port 21. SFTP â another, completely different file transfer protocol that has nothing to do with FTP. SFTP runs over an SSH session, usually on TCP port 22. It has been around since late 1990s.