RE: home_net and external_net: how to use ! with multiple subnets ?

[Tom Van Overbeke <tvanoverbeke () ccncsi net>]

Hi,

just for clarification, i have this in my snort.conf:


var EXTERNAL_NET !$HOME_NET

and in the rules the variable EXTERNAL_NET has a leading $ everywhere.

so maybe my version is too old ? i'm running version snort-2.0.0-1.0.10 on
redhat advanced server 2.1

What version are you guys running ?


thx,


tom.




> -----Original Message-----
> From: L. Christopher Luther [mailto:CLuther () Xybernaut com]
> Sent: 20 August 2003 18:04
> To: 'Tom Van Overbeke'
> Cc: Snort-Users (E-mail); 'Erek Adams'
> Subject: RE: [Snort-users] home_net and external_net: how to
> use ! with
> multiple subnets ?
>
>
> 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 () ccncsi net]
> 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 () lists sourceforge net
> > [mailto:snort-users-admin () 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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