Snort mailing list archives
RE: Snort doesn't appear to be looking at everythin g on our network
From: Robby Desmond <rdesmond () els ucsb edu>
Date: Tue, 22 Oct 2002 15:24:44 -0700
At 02:13 PM 10/22/02 -0700, Bob Dehnhardt wrote:
Steve, it sound like you network is fully switched - a sniffer is this environment would display the symptoms you're describing (in switched networks, traffic is segregated, and you won't see the whole network). Try moving your sensor to a network choke point, like the internal interface on a gateway switch or router. You still won't see all the traffic on your network (purely internal traffic will remain segregated), but you will see aggregate traffic entering and leaving your network. - Bob
In addition, most switch manufacturers havea command for port mirroring or monitoring. In Cisco terminology, this is called a SPAN port. Check out the documentation for your switches to find out how do this, then set up a port and hook the snort box into it.
-Robby Robert Desmond Systems Administrator UCSB Extended Learning Services 805-893-4906 -------------------------------------------------------This sf.net email is sponsored by: Influence the future of Java(TM) technology. Join the Java Community Process(SM) (JCP(SM)) program now. http://ads.sourceforge.net/cgi-bin/redirect.pl?sunm0002en
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- RE: Snort doesn't appear to be looking at everythin g on our network Robby Desmond (Oct 23)