Cannot connect to non standard port number with Windows command-line ftp (cmd ftp username n...



FTP is a commonly used protocol for transferring files between a client and a server over a network. It is commonly used for website maintenance, as well as for downloading and uploading files to a web server. However, when configuring an FTP server, it is sometimes necessary to use a non-standard port number, such as port 21. This can lead to difficulties when trying to connect to the server using the Windows command line FTP client, as the default port number used by the FTP client is port 21.

When attempting to connect to an FTP server with a non-standard port number, the Windows command line FTP client needs to be configured to use the correct port number. This can be done by using the \open\ command in the FTP client, which specifies the server name or IP address and the port number. For example, if the server name is \example.com\ and the port number is 1234, the command would be \open example.com 1234\. Once the command is entered, the user will be prompted to enter the username and password associated with the server, and then the connection will be established.

Once the connection is established, the user can upload and download files to and from the server, as well as list the available files and directories. Additionally, the user can execute other FTP commands, such as \put\ to upload a file, and \get\ to download a file. However, it is important to note that some FTP commands may not work correctly when using a non-standard port number, such as the \dir\ command, which is used to list the files and directories on the server.

It is also important to note that the command line FTP client is not the only way to connect to an FTP server with a non-standard port number. Some FTP clients may have the option to specify the port number when connecting to the server, or the user may be able to configure their firewall or router to forward the correct port number to the FTP server. Additionally, some FTP clients may support a feature called \passive mode\, which allows the user to connect to the server without specifying the port number.

In summary, when attempting to connect to an FTP server with a non-standard port number, the Windows command line FTP client needs to be configured to use the correct port number. This can be done by using the \open\ command in the FTP client, which specifies the server name or IP address and the port number. Once the connection is established, the user can upload and download files to and from the server, as well as list the available files and directories. Additionally, the user may be able to configure their firewall or router to forward the correct port number to the FTP server, or use a feature such as passive mode to connect without specifying the port number.

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