[Oisf-users] Help with good configuration for Suricata install with Napatech card

Rob MacGregor rob.macgregor at gmail.com
Fri Oct 9 09:14:10 UTC 2015

On Thu, Oct 8, 2015 at 10:50 PM Stephen Castellarin <castle1126 at yahoo.com>

> Hey Rob,

Don't forget to include the list ;)

Right now Suricata is configured for autofp.  The ntservice.ini is the
> default that came out of the driver install.  As for packet loss I know
> previously that with a 1Gb ethernet card I know that our tap infrastructure
> kept alerting that we were over-subscribing on the amount of traffic
> hitting the Suricata port.  It's hard to quantify what the packet loss on
> the current production system is - every time I run an ifconfig on that
> interface the dropped count continues to rise at a good clip.  Running
> "monitoring" on the new server shows 0 fragments, collisions, drop events
> or crc/align errors.

Hmmm, my Napatech install doesn't show up as an interface, so I can't
cross-check that. However, if the monitoring tool isn't reporting packet
loss, that's a good sign.

So, what do you expect/want to get "tuned up"?

Also, are you really sure those 24K rules are relevant? That's quite a
large ruleset...

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