https://app.knowbase.one/vault/rfc/docid/6972
RFC0640: Revised FTP reply codes
NWG/RFC# 640 JBP NJN 5-JUN-74 16:07 30843 Revised FTP Reply Codes Jon Postel 19 JUN 75 Revised FTP Reply Code...
NWG/RFC# 640 JBP NJN 5-JUN-74 16:07 30843 Revised FTP Reply Codes Jon Postel 19 JUN 75 Revised FTP Reply Code...