title: I can see port 21 is open in windows server 2016 using cmd prompt but is says closed when checked online
body: <p>I can see the port 21 is open in my windows server 2016 using netstat -a in command prompt but when i checked in online tool <a href="https://networkappers.com/tools/open-port-checker#.Wnm8vKiWZPY" rel="nofollow noreferrer">https://networkappers.com/tools/open-port-checker#.Wnm8vKiWZPY</a> it says closed. Can some one help me please.</p>
  
  <p>I am using this port for ftp via TCP.</p>
  
  <p>Thanks,
  Kshan</p>