Re: snot processes packets twice?

[Russ Combs <rcombs () sourcefire com>]

Not sure why you are seeing double; any chance you bridged eth0 and eth1?

On Wed, Jun 27, 2012 at 1:18 AM, <jorbru30 () comcast net> wrote:

> Hi,
>
>
>
> I am running snort version 2.9.1 as IPS using the following command.
>
>
>
> /usr/local/snort/bin/snort --daq afpacket -i eth0:eth1 -Q
> --daq-dir=/usr/local/lib/daq -l /var/log/snort -c
> /usr/local/snort/etc/snort.conf
>
> I am sending packets from a traffic generator tool which acts as a sender
> and receiver.
>
>       Traffic generator(TGS)<-> eth0 <->eth1 <-> Traffic generator(TGR)
>
>
>
> About 25,000 packets are seen at eth0 (packets sent from TGS and
> responses(mostly ack packets) from TGR).  The same set of packets are seen
> at eth1.
>
>
>
> After I stopped snort with ctr-c, snort displays ..."Snort processed 50531
> packets".
>
>
>
> I was expecting snort to process incoming packets (packets from eth0 to
> eth1) and outgoing packets (packets from eth1 to eth0) which is about
> 25,000 but it processes double # of packets.
>
>
>
> Please help me understand why snort process packets twice.
>
>
>
> Thank you!
>
>
>
> Jorda.
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Snort-users mailing list
> Snort-users () lists sourceforge net
> Go to this URL to change user options or unsubscribe:
> https://lists.sourceforge.net/lists/listinfo/snort-users
> Snort-users list archive:
> http://www.geocrawler.com/redir-sf.php3?list=snort-users
>
> Please visit http://blog.snort.org to stay current on all the latest
> Snort news!
------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/

_______________________________________________
Snort-users mailing list
Snort-users () lists sourceforge net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://www.geocrawler.com/redir-sf.php3?list=snort-users

Please visit http://blog.snort.org to stay current on all the latest Snort news!