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RE: Snort Help - Network IDS
From: "David Gillett" <gillettdavid () fhda edu>
Date: Thu, 15 Apr 2004 08:08:43 -0700

  Good places for IDS are (depending on what you want it to see)
either just inside, or just outside, the firewall.
  But you don't want an IDS failure to bring down your network.
Fair enough -- I don't believe Snort has to be in-line, as long
as it can see the traffic.  If you don't mind requiring the
connection between firewall and switch be HALF duplex(*), you can 
insert a hub there to hang the Snort box off of.

* - WAN speeds are typically much lower than LAN speeds, so this
isn't really a hardship.  If you really truly need this to be
full duplex, you'll need a "tap" instead of a hub.

David Gillett


-----Original Message-----
From: Jason Haith [mailto:jhaith () genesissys com]
Sent: Wednesday, April 14, 2004 1:22 PM
To: securityfocus
Subject: Snort Help - Network IDS


Recently I posted a question on different types of monitoring and ids
setups. I have decided to go with snort and have been using 
it on a smaller
network with no problem. However now, I need to move it to a 
production
network which will consist of around a 100 servers all linked 
through 3com
switches and going out through a watchgaurd firewall. I'm looking for
different ways to implement this without setting up another 
single point of
failure device which our firewall is. I'm not confident 
enough yet to risk
something like that. I haven't found much information on 
packet sniffing
when it comes to multiple entry points, found some info on 
wiretap, etc. but
I've always received such great help on here I thought I 
would ask before I
decided on something. Would really appreciate any help, I'm 
in a heck of a
bind right now. Thanks.


firewall
|
-3comswitch-servers
-3comswitch-servers
-3comswitch-servers

ids?


Jason Haith
Systems Administrator
Genesis Systems
5712 S. 77th St
Omaha, NE 68127
Phone: (402)592-1452
Fax:   (402)592-3650
Email: jhaith () genesissys com


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