hashlimit rule problem with port 80

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Hello list,

I have configured the hashlimit to protect port 80 (http) from apache
benchmark and related attack. The rule is

` ` `
iptables -A INPUT -p tcp -m state --state NEW --dport 80 -m hashlimit \
--hashlimit 200/sec --hashlimit-burst 5 --hashlimit-htable-expire 18000 \
--hashlimit-mode srcip --hashlimit-name http -j ACCEPT
` ` `
But I have found this rule is not protecting the apache and apache is
flooded by apache benchmark attack.
Have I done some thing wrong in my rule set ?
Please suggest.
Thanks

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জয়দীপ বক্সী

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