Protect your system from SSH brute force attacks
Despite all the discussions you might have read, SSH is a secure way to remotely connect to a GNU/Linux host. Unless you connect via SSH passwordlessly, using a public/private key pair, there is however a risk SSH is not really protecting you from: brute force attacks.
You have noticed that after (usually) 3 failed passwords, sshd drops your connection. But nobody prevents you from initiating a new connection right away!
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