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those numbers don't look good at when you take a look at what those two classes of people are doing.

ie. 1. is targeting you specifically, 2. is bot targeting everyone

when presented with two options, thinking of those options as 50:50 is natural, but it's really more like 0.0000001:99.9999999

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Anyway, those 0.999999 that don't scan the ports are doing lame attempts of guessing the password of your box, while the 0.000001 is doing that, but also trying new exploits that have a chance of working.

As a consequence, the chance of one of those 0.999999 bots invading your computer is zero, the chance of one of the 0.000001 doing the same is non-zero.

A bot doesn't necessarily only scan port 22 in a range - nothing stops the bot herder making it scan 1-1024 instead.

Yes there is. It's called economics.

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