Snort 2.9, RHEL 5 and afpacket DAQ

[Ralf Spenneberg <ralf () spenneberg de>]

Hi,

I am playing around with Snort 2.9.0 on RHEL 5. Using the DAQ libraries
with libpcap works fine. But the afpacket daq module always bails on
loading:

# snort --daq afpacket
Running in packet dump mode

        --== Initializing Snort ==--
Initializing Output Plugins!
afpacket DAQ configured to passive.
Acquiring network traffic from "eth0".

        --== Initialization Complete ==--

   ,,_     -*> Snort! <*-
  o"  )~   Version 2.9.0 (Build 68) 
   ''''    By Martin Roesch & The Snort Team:
http://www.snort.org/snort/snort-team
           Copyright (C) 1998-2010 Sourcefire, Inc., et al.
           Using libpcap version 1.1.1
           Using PCRE version: 6.6 06-Feb-2006

Commencing packet processing (pid=3329)
Decoding Ethernet
ERROR: Can't start DAQ (-1) - create_rx_ring: Couldn't create kernel RX
ring on packet socket: Cannot allocate memory!
Fatal Error, Quitting..


It works fine on Fedora 13. I have searched the mailing lists but have
not found any clue. Does the kernel on RHEL 5 (2.6.18) not provide the
necessary interface?

It would be fine if stated in the README or FAQ but I have not found
anything.

Any hints, clues, advices?

Kind regards,

Ralf



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