Login
Menu

How to check if the default FTP port 21 is blocked ?

Home / How to check if the default FTP port 21 is blocked ?

How to check if the default FTP port 21 is blocked ?

Many of the webmasters may be aware that Port 21 is the default Transmission management Protocol (TCP) for establishing an FTP connection. Every now and then users face issues with FTP connections. There is also an opportunity that your ISP would have blocked the port 21, resulting to connection errors for you.

In such a case users will quickly check if the web Service provider has blocked port 21. Below is how you’ll ensure that based on the operating system you have.

Below commands shows Status Check of port 21 for Windows Operating System

Go to Start menu tab. Then run ‘cmd’ which can take you to the command prompt. There within the command prompt or DOS prompt you can type the following command and hit Enter:

telnet yourdomainname.com 21

OR

telnet 123.456.789.86 21

Status Check of port 21 for Linux Operating System

Using your favorite terminal emulator you can run the below command to telnet your site:

telnet yourdomainname.com 21

OR

telnet 123.456.789.86 21

Note: You must replace yourdomainname.com with your website address or with your website/server IP (Internet Protocol).