Re: Taking a traffic snapshot with network IDS

Instead of capturing each packet, you would be better off going via the
Netflow Path IMHO.

There are a number of free netflow analyzers available on the Internet e.g.:

http://www.plixer.com/products/netflow-sflow/free-netflow-scrutinizer.php
http://www.solarwinds.com/products/freetools/netflow_analyzer.aspx
http://www.paessler.com/ ( I think they offer one netflow sensor in the free
version)

Regards

Farrukh

On Fri, Jun 18, 2010 at 4:58 PM, Yack, Daniel <[email protected]>wrote:

>  There are probably one thousand ways to do this, but I wanted to toss
> this out…
>
>
>
> For simplicity, let’s just say I’m watching traffic from an internet router
> to my core router(s).  That’s the only segment I’m interested in.  The goal
> is for me to discover out all ‘normal’ traffic in my environment, and take a
> snapshot of that.  By snapshot, I mean gather traffic for 24 hours.  Then
> review all of it manually, and create a template that says “alert when you
> find something that isn’t in this list”.
>
>
>
> I realize this is a pretty simple problem – but getting back to basics is
> always a good thing.  I do have some linux experience, but am not a ‘power
> user’.  Any ideas on tools or what to use for this?  An IDS/IPS is probably
> the answer here, right?  If so, which kind…perhaps snort?   I consider
> myself a firewall guy but am ashamed I’ve never used it!!
>
>
>
> Oh…as far as hardware available:  Doing this is in a lab first, which has:
> Cisco for the internet router, going through Fortigate and/or Checkpoint
> firewalls, into a Cisco core layer 3 switch.  Also I have a few linux
> platforms but they’re tasked for other things over there.  Don’t
> over-analyze the network topology, I can always move or make more than one
> IDS if needed.
>
>
>
> Any ideas?  Perhaps someone has done this before?
>
>
>
> -Dan
>
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