Mely N asked:
I’m trying to prevent loic attackes by using this command
iptables -A INPUT -p tcp --dport 80 -m hashlimit --hashlimit-upto 50/min \ --hashlimit-burst 500 --hashlimit-mode srcip --hashlimit-name http -j ACCEPT iptables -A INPUT -p tcp --dport 80 -j DROP
reference: How to prevent a LOIC (DDOS) attack?
I always got this error message:
iptables v1.3.5: Unknown arg `--hashlimit-upto'
What’s causing it and how can I fix it?
You’re using an ancient version of iptables which dates back to January 2006, and probably on a very old Linux distribution.
The problem is that the feature you were trying to use was added to iptables in 2008.
The solution is to update to a more modern Linux distribution.
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