ftp port in aws still closed after update security group

Juan Carlos Oropeza asked:

I went to security group and add the rule for tcp 21

enter image description here

But when use this tool to check the port, still say is closed.

enter image description here

I know the tool works, because if I remove the line for http, then say port 80 is closed.

So why even when add the port to the security group still appear as closed?

EDIT: The FileZila server is running but still the port say is close on the public ip. Using FileZila client direct on the amazon machine I can connect to localhost. But from outside using the public ip I cant.

using netstats -an

enter image description here

and netstats -ab

TCP    [::]:21                myserver:0         LISTENING
[FileZilla Server.exe]

TCP             myserver:0         LISTENING
[FileZilla Server.exe]

My answer:

A service must be running on the port for it to be open. Start your FTP server.

View the full question and any other answers on Server Fault.

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.