fail2ban increases your server performance. It cuts down on enormous amounts of logging from failed attempts, and reduces the CPU used to deal with the failures

fail2ban increases your server performance. It cuts down on enormous amounts of logging from failed attempts, and reduces the CPU used to deal with the failures. Some sites get a mind boggling amount of attempts. For example I sysadmin some Jewish sites, and they get exponentially more hacking attempts than the sites not mainly used by Jews. (This was before the current war mind you, I'm sure it's worse now.)