My sftp client suddenly stop connecting. When attempting to connect I get a message about algorithm mismatch. Attempting to login with ftp gives an authentication error. When I try the web-based net2ftp in the panel I get an authentication error.
DH support said my user accounts were in a blacklist file on the server. Typical of DH support, he did not know how my usernames got in the file. He cleared the names off the file and I was able to connect via ftp and net2ftp but not sftp.
Not surprisingly, a few hours later the problem appeared again, and I get the exact same messages when I attempt to connect. So I am restricted to using the shell. I have submitted another support ticket, but over 20 hours later I have no response.
What is this “blacklist?” How can a site owner’s username get placed in this file?
And most importantly, how the heck does anyone get a response from support? How do I get someone in support to find out why this has happened so that I can prevent it?