Secure File Transfer Protocol

Posted by E-Lins Technology on December 21st, 2019

Secure File Transfer Protoco, a secure network encryption method can be provided for transferring files. Sftp has almost the same syntax and functionality as ftp. SFTP is part of SSH and is a secure way to transfer files to a Blogger server. In fact, the SSH package already contains a secure file information transfer subsystem called SFTP (Secure File Transfer Protocol). SFTP itself does not have a separate daemon. It must use the sshd daemon (the port number is 22 by default). The corresponding connection and reply operations are completed, so in a sense, SFTP is not like a server program, but more like a client program. SFTP also uses encrypted transmission of authentication information and transmitted data, so using SFTP is very secure. However, since this transmission method uses encryption/decryption technology, the transmission efficiency is much lower than that of ordinary FTP. If you have higher requirements for network security, you can use SFTP instead of FTP.

FTP is a file transfer protocol, generally for the convenience of data sharing. Includes an FTP server and multiple FTP clients. The FTP client downloads resources on the server through the FTP protocol. The SFTP protocol encrypts data on the basis of FTP, making the transmitted data relatively safer. But this kind of security comes at the expense of efficiency, which means that SFTP's transmission efficiency is lower than FTP (although in reality, no big difference is found). Personal superficial thinking is: one; FTP to install, SFTP do not install. Second, SFTP is more secure, but more secure side effects are less efficient than FTP.

connection method

Windows can use Core FTP, FileZilla, WinSCP, XFTP to connect to SFTP for uploading, downloading files, creating and deleting directories.

In linux, type directly in the terminal: SFTP username@remote ip (or remote host name). When verification occurs, you can complete the remote link by filling in the correct password. After the login is successful, the terminal presents: SFTP

The operation in the sftp environment is similar to the operation of the general ftp. The commands is, RM, MKDIR, DIR,PWD, etc. are all operated on the remote end. If you want to operate locally, you only need to add the above instructions. 'l' becomes:IIS, ICD, IPWD, etc. Of course, since it is ftp, of course, it must be said that it is uploaded and downloaded!

Upload: put /path/filename (local host) /path/filename (remote host);

Download: get /path/filename (remote host) /path/filename (local host).

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