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Disable ssh access for password-guessing bots
And I disagree with you. The bots I've seen attacking public ssh servers at random do _not_ scan all ports but just go for the easy route. Sure, if some hacker is dedicating all its time to crash just your machine, he's going for the port scan route for sure, but the poster here tries to get rid of the random and dumb attempts, which are the major and most common annoyonce for a public server.
Disable ssh access for password-guessing bots
Perhaps I read the original hint wrong, then. It didn't seem aimed at preventing the messages from appearing (which your suggestion would definitely help with), but the poster seemed to want to ban machines that try and fail too many times, which seems like a security issue.
Disable ssh access for password-guessing bots
I agree with both of you - changing the port WILL stop the constant bot scans - they only check port 22.
Disable ssh access for password-guessing bots
I don't think that IPFW lets you overload tables dynamically like PF. I'm willing (and hoping) to be proven wrong on this, though. |
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