[Snort-users] home_net and external_net: how to use ! with mu ltiple subnets ?

L. Christopher Luther CLuther at ...6333...
Wed Aug 20 09:27:15 EDT 2003


Make sure your bad-traffic.rules file uses $EXTERNAL_NET and not just
EXTERNAL_NET.  The rules parser needs the leading "$" character in order to
treat the EXTERNAL_NET as a macro.  

Cheers!  


-----Original Message-----
From: Tom Van Overbeke [mailto:tvanoverbeke at ...8643...]
Sent: Wednesday, August 20, 2003 10:13 AM
To: 'Erek Adams'
Cc: 'Snort-Users (E-mail)'
Subject: RE: [Snort-users] home_net and external_net: how to use ! with
multiple subnets ?


sorry but no go:

if i try it, snort won't run, it quits with this error:


Aug 20 16:10:58 pitbull snort: FATAL ERROR: Undefined variable name:
(/var/chroot/snort/etc/./snort.org-rules/bad-traffic.rules:12): EXTERNAL_NET



> -----Original Message-----
> From: snort-users-admin at lists.sourceforge.net
> [mailto:snort-users-admin at lists.sourceforge.net]On Behalf Of
> Erek Adams
> Sent: 20 August 2003 15:12
> To: Tom Van Overbeke
> Cc: Snort-Users (E-mail)
> Subject: Re: [Snort-users] home_net and external_net: how to
> use ! with
> multiple subnets ?
>
>
> On Wed, 20 Aug 2003, Tom Van Overbeke wrote:
>
> [...snip...]
>
> > is there a way to define external_net as 'everything that
> is not home_net',
> > and if yes, what's the correct syntax ?
>
> 	var EXTERNAL_NET !$HOME_NET
>
> [...snip...]
>
> Cheers!
>
> -----
> Erek Adams
>
>    "When things get weird, the weird turn pro."   H.S. Thompson
>
>
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