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<p class="MsoNormal">Some strange voodoo here –<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was troubleshooting instances of Suricata being down on multiple hosts and I found that 2 production hosts running 4.04 and 2 test hosts running 4.05 and 4.1rc1 faulted at roughly the same time. Strangely, 2 additional production hosts
running 4.04 on duplicate hardware have not had any issues to date. Below is the outline of what I’ve been able to put together this morning.<o:p></o:p></p>
<p class="MsoNormal"><o:p></o:p></p>
<p class="MsoNormal"><img width="1058" height="121" style="width:11.0208in;height:1.2604in" id="Picture_x0020_1" src="cid:image002.png@01D45598.434EBA90"><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What is the same across all platforms faulting or not:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="color:black">All use tpacket v3 & AF-PACKET<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">All use workers mode<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">All are in IDS mode <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">All ingest traffic from Gigamon taps<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">All are running CentOS 7.5 64bit<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">All use Intel(R) 10GbE PCI Express Linux Network Driver 5.3.7<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">All use Intel Corporation 82599ES 10-Gigabit SFI/SFP+<o:p></o:p></span></p>
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<p class="MsoNormal">What is different:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">NO FAULT:<span style="color:black"> #zero-copy-size: 128<o:p></o:p></span></p>
<p class="MsoNormal">FAULT: <span style="color:black">zero-copy-size: 128<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">NO FAULT:<o:p></o:p></p>
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<p class="MsoNormal"> prio:</p>
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<p class="MsoNormal"># low: [ 0 ]</p>
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<p class="MsoNormal"># medium: [ "1-2" ]</p>
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<p class="MsoNormal"># high: [ 3 ]</p>
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<p class="MsoNormal"> default: "high"</p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">FAULT:<o:p></o:p></p>
<p class="MsoNormal"> prio:<o:p></o:p></p>
<p class="MsoNormal"> low: [ 0 ]<o:p></o:p></p>
<p class="MsoNormal"> medium: [ "1-2" ]<o:p></o:p></p>
<p class="MsoNormal"> high: [ 3 ]<o:p></o:p></p>
<p class="MsoNormal"> default: "high"<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sean Cloherty<o:p></o:p></p>
<p class="MsoNormal">Lead InfoSec Engineer/Scientist<o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:MITRE;color:#2E74B5">MITRE</span> Corporation<o:p></o:p></p>
<p class="MsoNormal">office (781) 271-3707<o:p></o:p></p>
<p class="MsoNormal">cell (781) 697-8043<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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