After changing the port to a much higher number, TCP 45678, the average of people connecting and guessing any username or password was two per day. It's a favor you can do yourself to cut out a good amount of noise from your logs.įor this article, I had an SSH server default port TCP 22 over one cloud provider, and the average attacks per minute were 24. Anyone with a port scanner can discover an SSH port even after you moved it, so you're hardly removing yourself from harm's way, but you do conveniently avoid hundreds of unsophisticated scripts launched against your server. This is the one that not all administrators remember. The default settings are generally very conservative, but I tend to make some adjustments to optimize my SSH experience and protect my servers from unauthorized access. Once you install this package, you have a file named sshd_config that controls most of the behavior of the service. The most common implementation of the SSH protocol is OpenSSH, developed by the OpenBSD project and available to most Linux and Unix-like operating systems. Free online course: RHEL Technical Overview.
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