I know this is a little off topic, yet I wrote this a while back because of 
script kiddies messing with ssh on my server at the time. 
https://docs.google.com/document/d/1voXlQpos4uI0qhndcIunBew1mmQbwTPl07xG5JF8bNM/edit?usp=drive_web
It checks your auth.log for people trying to get in that don't belong and sends 
an email to the isp hosting their ip address. 
Every little bit helps to keep the net safe.
Take care. 

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