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Re: [Snort-users] Snort 2.9, RHEL 5 and afpacket DAQ
From: Ralf Spenneberg <ralf_at_nospam>Date: Tue Oct 19 2010 - 05:39:34 GMT
To: Russ Combs <rcombs@sourcefire.com>
Hi Russ,
Am Montag, den 18.10.2010, 15:36 -0400 schrieb Russ Combs:
> Check the DAQ distro README for how to use this option:
> --daq-var buffer_size_mb=<#MB>
> You pass that to Snort which gives it to afpacket.
Thanks a lot for the suggestion, but Looking at the source it should use
a default of 128M if nothing is specified.
Anyway. I played around with the option and apparently I can set it to
49M but not more on this system. Therefore the default did not work!
System:
RHEL5, 4GB, 64bit Kernel: 2.6.18-194.el5
Any clue what might be the restricting factor? Oh, by the way using
PCAP-FRAMES I can use a 2GB ring buffer, so it must be some special
restriction to the afpacket ringbuffer.
Any ideas? Anybody else using the feature on RHEL/CentOS?
Ralf
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