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English CS2D dedicated firewall

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old CS2D dedicated firewall

Near
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Hello everyone

I'm just asking here if someone has a tutorial to protect my dedicated server which runs on vps (debian 64bits) against hackers. I mean even with the whole settings of the security page from cs2d.com my server is often crashed and i don't understand why. So i checked my logs and after these kind of lines my server is down (*Flood Warning* or unexpected message). So how can i make a firewall which protect my cs2d server("UDP port") against hackers/ddos ?

old Re: CS2D dedicated firewall

zomb1e
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Protecting yourself against a Denial of Service attack is a difficult task, especially if you use UDP. For TCP you could use a iptables-rule looking similar to this one:
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iptables -A INPUT -p tcp --syn -m limit --limit 1 /s --limit-burst 8 -j DROP

Another problem is that you could ease the load the application itself generates, but the traffic still comes in so your network connection could still end up being used to capacity. I found this article. Maybe it's helpful.
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