http://qs1969.pair.com?node_id=489344


in reply to Re^5: Having a problem with Net::FTP, I think...
in thread Having a problem with Net::FTP, I think...

System Preferences -> Sharing -> Firewall -> New

Set "Port Name" to "Other", add a TCP port number of 20 (ftp-data), and set the description to whatever you like.