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BTW
If you use hes tool to crash a server please do not trust because theres a rat or keylogger there. (I will post results I've got later.)
iptables -A INPUT -p udp -m hashlimit --hashlimit 100/s --hashlimit-burst 300 --hashlimit-mode srcip --hashlimit-name CSS2dd -j ACCEPT iptables -A INPUT -p udp -j DROP