I stumbled upon the problem of fail2ban not banning after I had moved my ssh server to non standard port (let’s say 22022).

..And that’s why I use to hide the most server signatures I can on production servers.

In the unlikely event of receiving a phone call while editing from remote an important config file with vi, you surely have experienced that PUFF! your connection to the server is stuck, your file is stuck as well, and all your editings are lost.