sensor drops packets ?

["Juan Fernandez" <Juan.Fernandez () deltathree com>]

Hi,
 
One of my senosers which is located in the dmz an listens to the treffoc
there seems to not capturing all the data. I use AAnval to see the
alerts and there I noticed that I see just packets that the source ip is
my network. ( this is a loaded dmaz with many web servers. so I worked
on this sensor with tcpdump and there I saw in the last line that:
26152 packets received by filter
23806 packets dropped by kernel
 
why is that ? 
the nic operates an 100 mb full duplex...
 
thanks !

juan


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