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Virtually all SSH attacks are of the nature mysql:mysql or mysql:password, so you should be safe as long as you can trust your users not to be stupid. The attackers prefer quantity over quality when looking for targets.

And if you use SSH keys you should be totally safe.

Remember to apply security fixes though since the automatic attacks also probe for ancient versions of SSH servers.

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If you're worried about ssh brute force or just don't like all the noise in your logs, moving the port tends to drop off about 95% of them. In addition, running iptables tarpit rules (or your OS equivalent) tends to kill the rest fairly quickly.

Annoyingly I did this once and then promptly forgot the port number, resulting in nmap time :(

I put info like this in a password manager for sanity (Keepass, I work on a PC).

One easy way to manage it is make a folder for each hostname, and add things like mysql root password, ssh port, public IP, pivate IP as different entries relating to the all aspects of managing the host.

Yes I use keepassx as well now :)

I've been using sshguard, but I like the sound of these.

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