![]() When sending and receiving files on the FTP server, you face two risks. Part 7: 7 Common File Transfer ProtocolsįTPS a multi-transfer protocol, equivalent to an encrypted version of FTP. In 1999, FTP was updated to RFC 2428 to support the IPv6 protocol. In 1997, REC 959 was updated to provide new features defined in RFC 2228 to provide security features. In 1985, RFC 959 redefined FTP, this time introducing new administrative features, including the ability to create and delete file directories. In 1980, jon postel, a scientist at the Institute of Information Science at the University of Southern California, defined a new version of FTP in RFC 765. ![]() With the continuous development of the Internet, the FTP specification has undergone several revisions to accommodate network standards including TCP/IP. From 1971, when the first RFC for FTP was proposed by A KBHUSHAN (RFC114) to nearly half a century ago, FTP has been one of the most important and widely used services in the Internet with its unique advantages. Part 6: The Development of FTPįtp is the oldest network tool in the development of the Internet. This type of user is not assigned an account in the FTP server, but he/she can still access some public resources anonymously. ![]() This is also what we usually call anonymous access. An account with this type of user can only access the directories under its home directory, but not files outside its home directory. In this way, the server secures other files on the FTP service. However, this account has the feature that it can only access its own home directory. In FTP server, we often set up an account for different departments or a specific user. For example, the home directory of the system, etc. However, they can also change to other directories. When this type of user logs in to the FTP server, their default home directory is the directory named by their account. This type of user is the one who has an account on the FTP service. Part 5: User classification of FTP Real Account Note: If a binary file is transferred in ASCII, it will still be translated even if it is not needed. Even if the file containing the bit sequence on the destination machine is meaningless. In a binary transfer, the bit sequence of the file is preserved so that the original and the copy are bit-by-bit one-to-one. Before copying any non-text files, use the binary command to tell ftp to copy them. Note: It is often the case that the file the user is transferring contains files that are not text files they may be programs, databases, word processing files, or compressed files. ASCIIĪssuming that the file the user is copying contains simple ASCII text, if the remote machine is not running UNIX, when the file is transferred ftp will usually automatically adjust the contents of the file to facilitate the interpretation of the file into the format in which the text file is stored on the other computer. There are two ways to transfer FTP: ASCII, Binary. The task of the FTP is to transfer files from one computer to another, independent of the location of the two computers, the way they are connected, or even whether they use the same operating system. Passive (also known as PASV, passive way): Passive mode FTP client sends PASV command to FTP Server.Standard (also known as PORT mode, active mode): Standard mode FTP client sends PORT command to FTP server.
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