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/gist:78100f7fad93f58f325b

Created January 3, 2016 23:38
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gistfile1.txt
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j SSHSCAN
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A SSHSCAN -m recent --set --name SSH --rsource
-A SSHSCAN -m recent --update --seconds 3600 --hitcount 20 --name SSH --rsource -j LOG --log-prefix "Dropped SSH connection: " --log-level 6
-A SSHSCAN -m recent --update --seconds 3600 --hitcount 20 --name SSH --rsource -j DROP
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