RE: [Snort-users] Snort on a Gigabit Bandwidth

Thanks for all,=20

I think i can now make a test with a good idea of the system and =
hardware to use :))))

-----Message d'origine-----
De : snort-users-admin@lists.sourceforge.net
[mailto:snort-users-admin@lists.sourceforge.net]De la part de Erik
Fichtner
Envoy=E9 : lundi 16 ao=FBt 2004 17:37
=C0 : TRIBUT Mickael OF/DTRS
Cc : snort-users@lists.sourceforge.net
Objet : Re: [Snort-users] Snort on a Gigabit Bandwidth


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.... why isn't this in the FAQ? =20



On Mon, Aug 16, 2004 at 04:28:21PM +0200, TRIBUT Mickael OF/DTRS wrote:
> I want to configure a snort sond on a gigabit bandwidth and I know =
that snort only support 100 mb
>=20
> What could i do ???
>=20
> Indeed Libpcap librairy doesn't support gigabit, however i know that a =
patch for this kind if librairy exists !


Pick your poison:

http://public.lanl.gov/cpw/
-or-
http://www.ntop.org/PF_RING.html


> I also need an example of typical hardware pc for this sort of =
configuration !!

There isn't a typical config. You'll need to examine your hardware =
options
in great detail. =20

You need the best PCI-X backplane bandwidth you can get (go after=20
server motherboards, not desktop. 66MHz PCI is only good to =
400MBit/sec.
You're going to need 133MHz PCI-X).

You need as much memory as you can stand to hold your MMAP working=20
set as well as good memory performance (Xeon boxes are pretty good at =
this,=20
I don't know about the AMD offerings.).

You need great low-latency server network adapter(s) (133MHz PCI-X).

And keep in mind that your capture options will limit you further. Taps
require multiple NICs or some kind of aggregation system and span/mirror =
ports
sometimes arn't quite up to the task of a full gig of duplicated =
traffic.=20
Low end switches often don't have much more than a couple gig of =
internal BW
already.

Another thing to keep in mind is that many loadbalancers can split =
streams
to multiple sensors so you arn't required to have one system tuned to=20
theoretical maximum performance. If you really have a gigabit IDS=20
requirement, you can probably justify two or three smaller systems that =
can
each soak up a few hundreds of megabits/sec each.

Good luck on your quest for 62.5MBytes/sec.=20

- --=20
Erik Fichtner
Principal Engineer, Information Security, ServerVault Corp.
703-652-5900
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