[Snort-users] Configuring Cisco switches...

Bob Staaf rstaaf at ...1457...
Fri Sep 21 07:25:08 EDT 2001


Bryan,

    You need to create a network monitoring port on the Cisco Switch.  It
will mirror all the traffic to one port you can connect your snort box to.

http://www.cisco.com/warp/public/473/41.html

Hope this helps!

Bob Staaf
Southern Web Services
Orlando, Fl

----- Original Message -----
From: "Bryan Childs" <bryan.childs at ...3120...>
To: <snort-users at lists.sourceforge.net>
Sent: Friday, September 21, 2001 9:59 AM
Subject: [Snort-users] Configuring Cisco switches...


> [Also posted to the Snort forums]
>
>
> Hi everyone - this question has probably been done to death, but my google
> searching for answers has amounted to nought - so I'm going to have to ask
> it again I'm afraid!
>
> The network here in my building is of course suffering from the recent
Nimda
> virus/worm breakout, and we're trying to track infected boxes with snort.
>
> The entire network here is running on switched ethernet, which is giving
us
> a bit of a headache. Most of the switches are dumb 3Com supplied ones, but
> we've been sensible enough (we think) to plug out snort box into the Cisco
> one which sits at the top of the network.
>
> The trouble is that we *still* don't seem to be able to monitor attacks
> which don't directly go for the snort box itself.
>
> The card is set up in promiscuous mode as it should be - but we think we
> need to do something to the switch to make sure it sees ALL our internal
> network traffic.
>
> Does anyone know what we might have missed? Or have any suggestions at
all?
>
> Cheers amigos......
>
> Bryan
>
>
>
>
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