![]() If you have any more questions, don’t hesitate to leave a comment down below. You might also want to check out our articles on solving FTP issues like solving error 421 – too many connections and ECONNREFUSED. Some routers and firewalls block FTP port 21 due to security reasons, so it’s essential to check the port’s connection before performing the File Transfer Protocol. If you happen to have an FTP connection issue, it’s essential to verify whether or not there’s a blockage in port 21. Unfortunately, some routers and firewalls block this port because hackers often target FTP servers via port 21. An FTP client cannot perform the protocol if it fails to connect to the FTP ports. In order to work correctly, FTP must use two ports - port 21 for command and control, and port 20 for data transport. Double-click Internet Information Services (IIS) Manager. What Is FTP Port 21?įTP is an internet protocol that allows computers within the network to exchange files in bulk. Use the Windows key + X keyboard shortcut to open the Power User menu and select Control Panel. In the new dialog box, check the Telnet Client box and click OK. On the left panel, select Turn Windows features on or off.ģ. Navigate to Programs → Programs and Features. Press the Window+R keys together, then enter control to open up your Control Panel.Ģ. In this example, we’ll be showing how to enable Telnet Client on Windows:ġ. In this case, it will help us test the connectivity to FTP port 21. Telnet is a client-server protocol that enables remote control over computers. Since we’re be using a Telnet command to check the connection, you need to ensure that your operating system has Telnet Client enabled. If that’s the case, we recommend you to contact your ISP to open the port. If the 220 response doesn’t appear, that means the FTP port 21 is blocked.If the FTP port 21 is not blocked, the 220 response will appear. If you want to issue a command that is understood by a remote FTP server, but not by DOS, use the literal command in front of the FTP command.This same command applies to all operating systems. Make sure to change the domain name accordingly. ![]()
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