Comments on How to List Unsuccessful SSH Logins on Linux

This tutorial shows you how to identify and list unsuccessful SSH logins on the Linux shell.

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By: Steve-O
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Install fail2ban and either 3 or 5 attempts from the same IP will block an account for an hour.

Setup ssh-keys and you can make that 1 attempt and 30 days for the block, since you'll never attempt a bogus login again.

Creating ssh-keys is 1 command:    $ ssh-keygen -t ed25519Pushing the public key to the remote system is 1 other command:    $ ssh-copy-id -i ~/.ssh/id_ed25519.pub username@remoteThat's it.

Don't use passwords after the first login.  Please.