This has always been a problem, but I've found that using an IDS load
balancer does a lot to optimize packet inspection for promiscious devices.
http://www.toplayer.com/content/products/intrusion_detection/ids_balancer.jsp
-Mike
just to wrap some numbers around that, the worst case scenario for packets
per second on gigabit ethernet is around 3 million for a full-duplex link
(2,976,190 per second to be exact).
it is difficult to just get those packets to your application, much less
inspect all of them for attacks.
efficent algorithms are essential, you need to very quickly catagorize a
packet early on in the inspection so that you only do the necissary deep
analysis. (a over-simplified example would be that you catagorize by ports
so that you are not looking for IIS exploits in a SMTP session)
Mike
On Wed, 28 Dec 2005, Sanjay Rawat wrote:
Its not only installing GB NIC. An IDS/IPS must be capable of processing
the packet at that speed. For this purpose, it makes use of HW
accelerators, efficient algorithms and data structures.
I hope you have some idea now.
regards
-Sanjay
At 01:28 PM 12/23/2005, Siddharth Phadnis wrote:
>Hi All,
>
>Vendors have long been talking about gigabit ethernet capabilities of
>their IDS/IPS. It got me thinking that is it just a simple matter of
>installing a gigabit ethernet card in the appliance and capturing the
>packets or is there any specialized hardware which is required.
>
>In effect, what all challenges are involved in capturing packets off a
>gigabit ethernet network so that packets do not drop. Does it just
>involve the hardware or are there some considerations in software too?
>
>Regards,
>Siddharth
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