DDOS

[huzeyfe.onal at gmail.com (Huzeyfe Onal)]

One of the best open source  solutions for DOS/DDOS attacks is OpenBSD
Packet Filter. You can limit traffic with many
options(source/destination/port based rate limiting, SynProxy etc) . And for
detection DOS/DDOS I use Ourmon, Snort and aguri.

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Huzeyfe ONAL
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On Wed, Apr 21, 2010 at 12:36 AM, Geoff Shukin <shukin at gsenterprises.biz>wrote:

> Hi!
>
> I am curious to know what folks are doing to combat the issue of DDOS
> attacks.  I have heard about solutions from Arbor and TopLayer but wonder if
> they are effective.  Are there any other suggestions out there in PaulDotCom
> land?
>
> We have seen DDOS attacks against one of our websites (using a combination
> of ICMP, TCP SYN and UDP flood attacks). Firewall stops the attacks in that
> the web servers are ok but the firewall falls over with 100% CPU.
>
> Thanks
>
> Geoff
>
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