I created an Ubuntu instance on AWS and wanted to set up the FTP server. I referred this article on setting up vsftdp. I opened port 20,21,22 on my aws.
Now when I am using http://ftptest.net/ to check my configuration, it throws error;
Error: Reply does not contain valid response code The replies sent by your server are violating the FTP specifications. You have to upgrade to a proper server.
I am not able to really understand what could be the problem. Could anyone please help me? Thanks.