[rrd-users] Logging IP traffic without routing it ?

Simon Hobson linux at thehobsons.co.uk
Mon Jul 24 14:01:52 MEST 2006

I have a linux based router at one site that is logging traffic with 
iptables accounting rules and graphing it with rrd. Now the boss 
wants me to duplicate that on our main network connection.

However, we want to do it passively - ie set an interface in 
promiscuous mode and watch the packets as they go past (using either 
a hub or traffic mirroring on the switch), without being in the path 
of the traffic. Mostly this is so that we don't need to worry about 
having another device in the data stream.

Anyone any experience with this, or any helpful suggestions ?


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