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Port scanners do generally scan non-standard ports too, you know...

I don't think that exposing SSH to the internet is that bad, but your argument is not sound - requiring a VPN does add security, because if there happened to be a vulnerability in it that allowed access, all it would do is expose SSH on the machines (I'm assuming you have proper firewalls set up), which you are advocating making public in the first place.

Saying it adds no security is false, because you'd require an unpatched vulnerability both in your VPN server and in the SSH server simultaneously. A zero-day in one is possible, but in both at the same time is far, far less likely.




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