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Author Topic: IDS/IPS Perfromance  (Read 9298 times)
madswitcher
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« on: Thursday 09 August 2012, 05:04:46 am »

Hi All,
has anyone come across a performance limit when running the IPS module? 

I am running version 2.5.1 with the proxy running transparently and a fairly light rule set on the firewall. My line speed is about 106Mb/s, but drops down to about 35Mb/s when I turn the IPS on.

The hardware is quite nifty, 1Gb/s NICS,  No memory or swap pressure. Disc I/O is about 1 per second average.  CPU is ticking over at about 5.8 % User and 1.6% System with or without the IPS. Memory is 1GBytes with Used peaking at 34%.

Any thoughts or suggestions?

Thanks and regards

Mike
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oakleeman
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« Reply #1 on: Monday 20 August 2012, 07:33:33 am »

This is a known issue for us as well but no clue why.

We have a 50Mbps external connection and with IPS turned on it drops down to 35.

I setup a test install on our gigabit internal network and tested iperf to a server on the external side of the test install. With IPS turned off I got around 980Mbps but but IPS turned on it dropped down to to 280ish.

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