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<p class="MsoNormal"><span lang="EN-GB">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I’m successfully running Suricata (detection mode) for a long time in a dedicated physical machine, processing about 2 Gbps with no problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">Now I need to set up another Suricata box for inline mode as a virtual machine (just for 50Mbps), it’s a small VM (CentOS 7, 2 CPUs & 2 GB RAM) but it should be enough thought. I set up iptables that way:<o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">iptables -I FORWARD -j NFQUEUE --queue-bypass --queue-balance 0:1<o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">My problem is, when I start Suricata on inline mode, the network throughput drops dramatically… I run internet speed test<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">[15:24:30][admin@test ~]$ ./speedtest-cli<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Retrieving speedtest.net configuration...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Retrieving speedtest.net server list...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Selecting best server based on latency...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Hosted by masmovil (Madrid) [0.00 km]: 13.574 ms<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Testing download speed........................................<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas;color:red">Download: 602.14 Mbit/s<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Testing upload speed..................................................<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas;color:red">Upload: 136.50 Mbit/s<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">[15:25:02][root@suricata ~]$
<span style="color:red">systemctl start suricata<o:p></o:p></span></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas;color:red"><o:p> </o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">[15:25:24][admin@test ~]$ ./speedtest-cli<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Retrieving speedtest.net configuration...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Retrieving speedtest.net server list...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Selecting best server based on latency...<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Hosted by masmovil (Madrid) [0.00 km]: 10.948 ms<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Testing download speed........................................<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas;color:red">Download: 14.18 Mbit/s<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas">Testing upload speed..................................................<o:p></o:p></span></i></p>
<p class="MsoNormal"><i><span lang="EN-GB" style="font-family:Consolas;color:red">Upload: 3.08 Mbit/s<o:p></o:p></span></i></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">I’ve tried with 1 and 2 queues (-q 0 –q 1), and in both autofp and workers mode, no matter… always same results.
</span><span lang="EN-GB" style="mso-fareast-language:CA">Suricata threads does not consume much CPU, so it does not look like I need more cores.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA">Neither dmesg, journctl, /var/log/messages nor suricata logs are complaing about anything.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA">I’ve no idea where to look or what to try. Any suggestion will be wellcome.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB" style="mso-fareast-language:CA">Xavier Romero<o:p></o:p></span></p>
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