Re: challenges in capturing Gigabit ethernet

[Mike <mike () jeke fdns net>]

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
>
> Sanjay Rawat
> Senior Software Engineer
> INTOTO Software (India) Private Limited
> Uma Plaza, Above HSBC Bank, Nagarjuna Hills
> PunjaGutta,Hyderabad 500082 | India
> Office: + 91 40 23358927/28 Extn 422
> Website : www.intoto.com
>    Homepage: http://sanjay-rawat.tripod.com
>
>
>
>
>
>
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