Shulou(Shulou.com)06/02 Report--

In this issue, the editor will bring you about the difference between FTP and SFTP. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

FTP is a file transfer protocol. On the website, if you want to share files with people, the easiest way is to upload the files to the FTP server, and others can download the required files through the FTP client program.

FTP file transfer needs to be done through the port. The general required ports are:

1. Control link-TCP port 21. Controller side. Used to send instructions to the server and wait for the server to respond.

two。 Data link-TCP port 20. Data transfer port. Used to establish a data transmission channel. It is mainly used to send a file from the client to the server, a file from the server to the client, and a file or directory list from the server to the client.

In order to adapt to different network environments, FTP supports active connection and passive connection. Both modes are mainly for the data link and have nothing to do with the control link.

Security risks of FTP:

First, FTP server software loopholes.

Second, plaintext password.

Third, FTP flag.

Fourth, port scanning is carried out through the FTP server.

Fifth, data hijacking.

FTP's security policy:

First, use more secure systems and FTP service software.

Second, use ciphertext to transmit username and password.

Third, change the flag of the service software.

Fourth, strengthen the security of the protocol.

SFTP, which stands for Secure File Transfer Protocol, is a secure file transfer protocol. It can provide a secure encryption method for transferring files. Almost the same grammatical function as ftp.

SFTP is part of SSH and is a secure way to transfer files to a Blogger server. It does not have a separate daemon itself, and must use the sshd daemon to complete the corresponding connection operation, so in a sense, SFTP is not like a server program, but more like a client program. SFTP also uses encryption to transmit authentication information and transmitted data, so using SFTP is very secure. However, because this kind of transmission uses encryption / decryption technology, the transmission efficiency is much lower than that of ordinary FTP. When the requirement of network security is higher, it is used instead of FTP.

The above is the difference between FTP and SFTP shared by Xiaobian. If you happen to have similar doubts, you might as well refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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