Snort mailing list archives
Re: Inline snort negative impact on network
From: Y M <snort () outlook com>
Date: Thu, 13 Nov 2014 06:59:32 +0000
I would say tuning; NIC (gro, lro, etc), kernel (networking stack), and Snort itself (number of rules/processors, etc). Since you are already on Snort 2.9.7.0, why not using daq 2.0.4? And there is the "unknown/unexpected" hardware behavior. If all the tuning does not improve things, see if you can test with different NICs if possible. YM Date: Wed, 12 Nov 2014 20:31:31 -0800 From: charles.heselton () gmail com To: snort-users () lists sourceforge net Subject: [Snort-users] Inline snort negative impact on network I'm attempting to install/configure a standalone, inline snort box. When I have the sensor inline, with snort running, the traffic seems to be flowing properly; snort is alerting, as expected. However, browsing the web, and downloads, becomes significantly impacted. speedtest.net fails to load. wget downloads files at ~6Kbps, when it should be closer to 6Mbps. The question is why? Hardware: Intel Celeron 4 core, 8GB RAM, 64GB SSD, dual Gigabit (Realtek) NICs onboard, USB3.0->Gigabit dongle NIC (for admin). Software: Gentoo x86_64 linux; kernel 3.16.5; snort 2.7.0; daq 2.0.2. When snort is running, and traffic is passing, both gkrellm and top show almost 0 CPU activity. This is on a relatively low traffic, home network, so I wouldn't expect the system to be loaded. The admin interface shows more activity than the 2 bridged interfaces. What gives? Any advice appreciated. Thanks,Charlie ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk
_______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- Inline snort negative impact on network Charlie Heselton (Nov 12)
- Re: Inline snort negative impact on network Y M (Nov 12)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)
- Re: Inline snort negative impact on network Y M (Nov 13)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)
- Re: Inline snort negative impact on network Y M (Nov 13)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)
- Re: Inline snort negative impact on network Y M (Nov 14)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)
- Re: Inline snort negative impact on network Y M (Nov 12)
- Re: Inline snort negative impact on network waldo kitty (Nov 13)
- Re: Inline snort negative impact on network Charlie Heselton (Nov 13)