I have a ftp client installed in ubuntu, how to open port 21? [closed]

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I installed FileZilla in windows 7, and want to transfer compressed files from ubuntu (PHP web server) to windows 7 ftp server. How should I open port 21 in ubuntu? Any security issues are very welcomed.

Thanks,

YH

Answer 1

Try running 'netstat -an | grep 21' in a terminal to see if it's listening or not on the server. FTP sends out usernames and passwords unencrypted, so you might wanna look into using SFTP.