Techniques for passive traffic capturing

Kevin Kadow kkadow+pottedmeatproduct at
Tue Jun 24 03:00:06 UTC 2008

We started out with SPAN ports, then moved on to Netoptics taps.

Lately we've been using a combination of Cisco Netflow (from remote routers),
and native Argus flows (from local taps) where we need more details.

Flows are useful to answer "What happened X minutes/hours/days ago?",
and where you do not need/want to capture full packet bodies
(though with Argus you can choose whether to include payload data).

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