Sensor location

[César Sanabria <cesanpin () gmail com>]

Hi, i'm having troubles detecting traffic, my network is more or less:

              DMZ       
               |                                |------- LAN 1  (segment 191.168.1.x)
INTERNET ---- GW --(1)---GW-- |-------- LAN 2 (segment 191.168.2.x)
                  segement X           |                .
                                                |               .
                                                |------- LAN N (segment 191.168.n.x)

I put my sensor on (1) a segment x (192.x.x.x) and i would like to
catch all traffic from every LAN (segment), but i'm not logging all
alerts, i mean, suppously i'm on the fist segment and i ping a server
on the DMZ i can't see the traffic neither in sniffer mode, so the
question is:

Why i'm not logging alerts from other segments that aren't in the same
segment where i put my sensor?.. What can i do to log alerts?


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