[Snort-users] IDS Placement ideas for inside and outside a fi rewall.

FWAdmin FWAdmin at ...8484...
Wed Apr 2 12:13:06 EST 2003

Traffic doesn't have to go through the IDS, just pass by it, as you want the
IDS to sniff the traffic coming to and going from the firewall interface.
Place the IDS on one of your switch ports, set it to span the firewall port.

-----Original Message-----
From: Brei, Matt [mailto:mbrei at ...8727...] 
Sent: April 2, 2003 15:43
To: snort-users at lists.sourceforge.net
Subject: [Snort-users] IDS Placement ideas for inside and outside a

Hi everyone.  I am trying to convince my company to implement IDS on our
network but I have a few questions.  I know I would want one on both sides
of the firewall, but on a switched network, how would I force traffic to go
through Snort before it reached its destination?  Also, the way its set up
now, the Cisco 1751 router goes right into the Cisco PIX 501 firewall and
from there into a switch.  How would I place an IDS between the firewall and

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