Thank you for trying ftpd, and for the nicely done bug report. I love bug reports with runnable code.

Hypothesis

I suspect this is a network issue. The code raising the exception is here:

def open_active_data_connection
  data_socket = TCPSocket.new(@data_hostname, @data_port)
  ...
end

The server is trying to make a connection back to the client¹. That it times out is consistent with a client firewall that is dropping the packets that the server is sending when trying to make the connection.

Experiment

If my hypothesis is correct, then passive mode will work where active mode fails. Can you please try the ls command again, but in passive mode instead of active mode? How to do this depends upon your ftp client. In my client, the command is passive:

ftp> passive
Passive mode: on; fallback to active mode: on.
ftp> ls
227 Entering passive mode (127,0,0,1,182,247)
150 Opening ASCII mode data connection
226 Transfer complete
ftp>

In passive mode, all connections are from the client back to the server.

gem version

Version 0.6.0 is a year old. The current version is 0.17.0. I do not think that the latest version will fix this issue, but you may wish to upgrade anyway: there have been numerous bug fixes and enhancements in the last year.

¹That the server can make a connection back to the client is a seriously annoying part of the FTP protocol, and a source of endless trouble.

from ftpd.

Thanks for the quick answer, as you suspected it was a passive\active issue (damn FTP !!!)
Also after installing the gem from the git another issues with crashes when connection ended was fixed, as all my problems are now gone I will close this issue, thanks for a great gem and a great attitude ;)

from ftpd.

Outstanding! I love the smell of resolved issues in the morning. Thanks again for using ftpd.

from ftpd.