RE: disable spp_portscan2

["L. Christopher Luther" <CLuther () Xybernaut com>]

Yes, the "any" in 

    var EXTERNAL_NET any 

includes HOME_NET.  If you want EXTERNAL_NET to exclude HOME_NET, just
negate HOME_NET like so:  

    var EXTERNAL_NET !$HOME_NET  

- Christopher 


-----Original Message-----
From: John Sage [mailto:jsage () finchhaven com]
Sent: Tuesday, March 18, 2003 3:58 PM
To: Erek Adams
Cc: snort
Subject: Re: [Snort-users] disable spp_portscan2


Erek:

Here's a chance to ask a question I've had...

On or about Tue, Mar 18, 2003 at 11:46:06AM -0500, Erek Adams posited:
> On Tue, 18 Mar 2003, John Sage wrote:
>
> > Erek, et al:

<snip>

> As it's done above, you're setting EXTERNAL_NET to HOME_NET.  That
> basically turns most rules into "if from this host to this host."
>
> Now if that's what is really intended:
>
>       var HOME_NET $lo0_ADDRESS
>       var EXTERNAL_NET any

Does the "any" for EXTERNAL_NET include HOME_NET, or does it really
mean "any other"?



- John
-- 
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 or the configuration file build will puke."

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