Lots of stuff there, anyway, If I were you I will use something as follows to limit 5 connection per 5 minutes:
Code:
iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --set
iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --update --seconds 300 --hitcount 5 -j DROP
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Vivek Gite
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