The danger is that opening it to the WWW means bots are going to hit it hundreds of times a day and if passwords are not strong, bad things could happen and on top of that those passwords are sent in ...
1) I can't connect from my Windows 10 PC using Filezilla SFTP to my Mac Mini (Yosemite); Filezilla immediately says, "Server unexpectedly closed network connection". However, I can telnet to port 22 ...