تفاوت بین FTPS و SFTP

[LEFT][FONT=monospace]Is SFTP better than FTPS? What is the difference between the two؟
answer:
[/FONT][FONT=monospace]They are two completely different protocols.[/FONT]
[FONT=monospace]FTPS is FTP with SSL for security. It uses a control channel and opens new connections for the data transfer. As it uses SSL, it requires a certificate.[/FONT]
[FONT=monospace]SFTP (SSH File Transfer Protocol/Secure File Transfer Protocol) was designed as an extension of SSH to provide file transfer capability, so it usually uses only the SSH port for both data and control.[/FONT]
[FONT=monospace]In most SSH server installations you will have SFTP support, but FTPS would need the additional configuration of a supported FTP server.
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[FONT=monospace]FTPS (FTP/SSL) is a name used to provide a number of ways that FTP software can perform secure file transfers. Each way involves the use of a SSL/TLS layer below the standard FTP protocol to encrypt the control and/or data channels.[/FONT]
[FONT=monospace] مزایا Pros:[/FONT]

[LIST][*]Widely known and used[*]The communication can be read and understood by a human[*]Provides services for server-to-server file transfer[*]SSL/TLS has good authentication mechanisms (X.509 certificate features)[*]FTP and SSL/TLS support is built into many internet communications frameworks[/LIST]
[FONT=monospace] معایب Cons: [/FONT]

[LIST][*]Does not have a uniform directory listing format[*]Requires a secondary DATA channel, which makes it hard to use behind firewalls[*]Does not define a standard for file name character sets (encodings)[*]Not all FTP servers support SSL/TLS[*]Does not have a standard way to get and change file or directory attributes[/LIST]
[FONT=monospace]SFTP (SSH File Transfer Protocol) is a network protocol that provides file transfer and manipulation functionality over any reliable data stream. It is typically used with the SSH-2 protocol (TCP port 22) to provide secure file transfer, but is intended to be usable with other protocols as well.[/FONT]
[FONT=monospace] مزایاPros:[/FONT]

[LIST][*]Has a good standards background which strictly defines most (if not all) aspects of operations[*]Has only one connection (no need for a DATA connection)[*]The connection is always secured[*]The directory listing is uniform and machine-readable[*]The protocol includes operations for permission and attribute manipulation, file locking, and more functionality[/LIST]
[FONT=monospace] معایب Cons:[/FONT]

[LIST][*]The communication is binary and can not be logged “as is” for human reading[*]SSH keys are harder to manage and validate[*]The standards define certain things as optional or recommended, which leads to certain compatibility problems between different software titles from different vendors.[*]No server-to-server copy and recursive directory removal operations[*]No built-in SSH/SFTP support in VCL and .NET frameworks[/LIST]
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