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Security through obfuscation is never a good idea. Best practices for exposing ssh (iirc):
All of those are pretty easy to do, and after that you're in a really good place.
I don't see a problem with ssh tunneling to access services, as long as the ssh server is secured correctly
I should install fail2ban. I already have everything else covered. I've only heard of fail2ban, not very familiar with it. Is it necessary if password login is disabled? Can you brute force ssh keys? I really appreciate your advice.
I definitely recommend you do your own research into this. Brute forcing ssh keys should be practically impossible. Is it necessary to install fail2ban with password login disabled? Not sure, I'm of the opinion that it won't hurt, just one more line of defense. It's pretty easy to setup.
Cool, thanks so much!