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free anti flood ?

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Join Date: Jan 2004
Posts: 22

free anti flood ?

hey guys
does anybody have a free , effective and powerfull anti flood software??!!

I need one , to prevent DDos , Dos and Syn flood at least

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Web Hosting Master
Join Date: Jun 2003
Location: World Wide Web
Posts: 581
I think APF firewall has a built in antidos feature. Also, you might as well compile your kenel with SYN cookies which will help prevent SYN flooding.
In addition to these, you could also, drop continous connections from a source ip by using the --limit chain in iptables, if it exceeds x number of connections per second.

and sample chain would look like :

/sbin/iptables -A INPUT -p icmp --icmp-type 8 -m limit --limit 1/second -j ACCEPT

I hope it was helpful. Thanks.

Vivek Prasannan

Web Hosting Master
Join Date: May 2003
Posts: 1,148
For DDos you can't even buy one.
Look at SCO they were DDoS and could not do anything about it, even with all that Microsoft Funding.

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Problem Solver
Join Date: Mar 2003
Location: California USA
Posts: 13,245
Its not possible to completely block a dos, a friend of mine was talking about a system he was working on which would virtually make it impossible to dos using intelligent routing and such but that requires several boxes

Steven Ciaburri | Proactive Linux Server Management -
System Administration Extraordinaire | Follow us on twitter:@Rack911Labs
Managed Servers (AS62710), Server Management, and Security Auditing. - Security notices for the hosting community.


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