[Snort-users] Snort performance concerns

nwr nwr at ...13125...
Sun Oct 2 16:01:09 EDT 2005


I have some Sourcefire NS3020F chassis- dual pentium 2.4ghz, 2 gig of 
ram and a Intel Pro 1000base SFP fiber Gig uplink- I think sourcefire 
sold these with software for $30,000 each-

I am selling these for $1495 each with a 30 day warranty

Let me know if you can use them- I have 4 in stock-

Chris Blackburn
360 Belmont St. NE
Salem OR 97301
(503) 391-8191 Ext 1#
(503) 375-8470 FAX
nwr at ...13125...
IM= Chris NWR

We are always buying Cisco(12000, Cerent 15454, , Alteon, Extreme 
Networks, IXIA, Foundry, Dialogic, Clarent, Excel-Lucent, Lucent DACS, 
Eastern Research. Junper, Unisphere, Redback, Nuera, Natural 
Microsystem, Smartbits, Adtech, Spirent, CAC, Cosine, Sonus, Alcatel 
Omnicore, HP Procurve, Datakinetics, NACT, Nortel Passport 15000, 
Quintum Gateways, Western Multiplex, Digital Lightwave, 3com, Netscreen


Larry Wichman wrote:

> I enabled Performance Monitor on my sensors and I have some concerns 
> after looking at some of the performance stats. First, I have three 
> sensors, two of which average 96mb/sec of traffic and the dropped 
> packets percentage average is about 10% (proc and memory utilization 
> are high, as expected). I have a third sensor that sees an average of 
> about 5mb/sec and has the same amount of dropped packets, memory and 
> proc utilization are minimal. I have implemented all the suggested 
> optimizations (I think), patched Libpcap, etc….I can understand that 
> there would be some dropped packets when the traffic is at a high, 
> continuous load, but the third sensor with the same amount of dropped 
> packets with only a fraction of the traffic concerns me. I am thinking 
> about upgrading the hardware (faster proc, bus speeds, etc…), but I 
> might be wasting money if the stats are the same. Does anyone have any 
> input as to what is causing the dropped packets?
> Also, my boss told me to start evaluating commercial products. My 
> first choice would be Sourcfire, I really do like working with Snort, 
> but I need whatever product I choose to be able to handle the amount 
> of traffic that we have. I would greatly appreciate any input on this. 
> Cheers.
> Larry

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