What is SSH File Transfer Protocol ?

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SSH File Transfer Protocol (SFTP) is a part of the SSH protocol suite.

Sometimes also called the Secure File Transfer Protocol, it provides implements secure file transfers over SSH.

It supports the full security and authentication functionality of the SSH protocol, including SSH keys.

SFTP can furthermore be used for file sharing, similar to Windows file sharing and Linux NFS.

The main difference is that SFTP is secure, and can be used reliably over Network Address Translation (NAT) and the public Internet.

SFTP has pretty much replaced legacy FTP as a file transfer protocol, and is quickly replacing FTP/S.

It provides all the functionality offered by these protocols, but more securely and more reliably, with easier configuration. There is basically no reason to use the legacy protocols any more.

SFTP also protects against password sniffing attacks and man-in-the-middle attacks.
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