If all these tips don't allow you to connect to the server, try to set your FTP client in passive mode. set the number of the FTP connections to the minimum allowed.check the FTP client's connection settings.
check you FTP account details for errors.If you do connect to the FTP server using telnet, but you have problems in establishing an FTP connection using your FTP software, do the following: If your FTP port is already listed there and you can't open an FTP connection using telnet, please contact your ISP and ask them to open port 21.
#FTP SERVER PORT SOFTWARE#
If you didn't establish an FTP connection using telnet, you should check your firewall software and add your FTP Client in the exclusion / white list of programs which can open ports. Results from the 21 port check telnet 21Ģ20 ProFTPD 1.2.10 Server () If the connection is successfully opened, the result should be similar. An example of a telnet command to check FTP port 21 telnet 21 Depending on your OS, you can open a terminal ( Linux, OSX) or a command prompt (Windows XP, Vista, Windows7) and type the line below. To check if your router or ISP is blocking the port 21, you should use telnet.
Resolving problems with a blocked FTP portĪs we've already mentioned, the default command port for FTP connections is port 21, so, it's important to check if your ISP is not blocking the access to that port. Then a second connection to the server is made by the client, followed by a response of the FTP server from the port for sending data (the default data sending port is 20), when the real file transfer actually begins. Once the user enters the name of the server and the login credentials in the authorization fields of the FTP client, the FTP connection is established and the FTP control port of the FTP server (the default port for sending commands is 21) is opened. The FTP connections are executed through certain ports, which are either the default TCP ports or custom ports set by an administrator.Įxecuting an FTP port connection through a client is a two-stage process requiring the use of two different ports. Through FTP software tools users can establish connections with a remote machine of their choice and perform any necessary data transfers. The FTP, or the File Transfer Protocol, makes it possible for users to exchange files between their personal computers and remote servers with the help of specialized software tools called FTP clients.
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