Re: how to use snort in a switched environment

[Erek Adams <erek () snort org>]

On Wed, 14 May 2003, Jeremy Rodriguez wrote:

> > From snort DOCS:
> Q: I'm on a switched network, can I still use Snort?
>
> A: Being able to sniff on a switched network depends on what type of
>    switch is being used.  If the switch can mirror traffic, then set
>    the switch to mirror all traffic to the snort machine's port.
>
> My question is that I have a Cisco WS-C2924-XL and I was wondering if anyone
> has used snort and these switches successfully.

[...snip...]

2924's can be configed to use a SPAN port.  Just don't do that if you have
a high sustained traffic rate, else the switch will fall over and die.
Check Cisco's site for details on how to config a SPAN port on those.

Cheers!

-----
Erek Adams

   "When things get weird, the weird turn pro."   H.S. Thompson


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