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Below is a list of FTP commands that may be sent to a File Transfer Protocol (FTP) server. It includes all commands that are standardized by the Internet Engineering Task Force (IETF) in RFC 959, plus extensions. Note that most command-line FTP clients present their own non-standard set of commands to users. For example, GET is the common user ...
FTP login uses normal username and password scheme for granting access. [2] The username is sent to the server using the USER command, and the password is sent using the PASS command. [2] This sequence is unencrypted "on the wire", so may be vulnerable to a network sniffing attack. [22]
A rule of thumb in determining if a reply fits into the 4xx or the 5xx (Permanent Negative) category is that replies are 4xx if the commands can be repeated without any change in command form or in properties of the User or Server (e.g., the command is spelled the same with the same arguments used; the user does not change his file access or ...
An FTPmail server is a proxy server which (asynchronously) connects to remote FTP servers in response to email requests, returning the downloaded files as an email attachment. This service might be useful to users who cannot themselves initiate an FTP session—for example, because they are constrained by restrictions on their Internet access.
net2ftp can be set to restrict connections via an access list and can log user actions. Other plugins can be installed to add additional functionality as well. net2ftp can also be downloaded and installed on a host server, in which the requirements are: A web server which can run PHP; PHP 4.2.3 or greater (one optional feature requires PHP 5)
Two separate methods were developed to invoke client security for use with FTP clients: Implicit and Explicit.While the implicit method requires that a Transport Layer Security is established from the beginning of the connection, which in turn breaks the compatibility with non-FTPS-aware clients and servers, the explicit method uses standard FTP protocol commands and replies in order to ...
Big FTP sites can be run by many computers in order to be able to serve the desired maximum number of clients connected to servers. A client program connects to an FTP server, then, unless anonymous access is enabled, it has to authenticate itself by sending username and password ; after that it can retrieve and/or send files to the server ...
In the context of an HTTP transaction, basic access authentication is a method for an HTTP user agent (e.g. a web browser) to provide a user name and password when making a request. In basic HTTP authentication, a request contains a header field in the form of Authorization: Basic <credentials> , where <credentials> is the Base64 encoding of ID ...