“Ban Automatic with fail2ban
Most of the time, when someone trying to hack your server, hacker use brute force method. That is to say they test all possible passwords, starting with the most likely (as dictionary words) to the more unlikely (sequences of random characters). With the computing power of today’s computers, it works not too bad if your password is simple. Fortunately we can easily counter it by installing a system that automatically ban people who try to connect on many occasions without success.