AlexFTPS provides a free FTP/FTPS client and class library available on any platform supporting the .Net Framework 2.0 or Mono 2.0 . This project was started to support the FTPS features of FTP for IIS 7.0 Implemented RFCs: 959, 2228, 2389, 2428, 2640, 3659, 4217 FTPS (sometimes called FTPES) is implemented as described in the RFC 4217 and RFC 2228 documents. https://www.ietf.org/rfc/rfc4217.txt