Re: Homenet Question

[Ian Bowers <iggdawg () gmail com>]

Alternately, if you have some reason for using "any" as EXTERNAL_NET, you
can change the variable in the rule from EXTERNAL_NET to !$HOME_NET.  If
you use PulledPork, place this in modifysid.conf :

2009702 "$EXTERNAL_NET" "!$HOME_NET"

However I imagine similar issue will come up in other rules.  Adam's
solution is probably the best way to go.

-Ian

On Wed, May 2, 2012 at 10:13 AM, Adam Gardner <adamgardner502 () gmail com>wrote:

> Since your $EXTERNAL_NET is set to "any" 10.0.0.0/8 is included in that.
>  You'll probably want to set $EXTERNAL_NET to !$HOME_NET.
>
>
> On Wed, May 2, 2012 at 9:46 AM, Gibson, Samuel <gibsons () my uwstout edu>wrote:
>
> > Hello,
> >
> > I am having an interesting issue with the homenet.  I have it setup in
> > snort.conf as follows:
> >
> > ipvar HOME_NET [10.0.0.0/8]
> >
> > ipvar EXTERNAL_NET any
> >
> > ipvar DNS_Servers [10.1.2.3,10.1.2.4]
> >
> > Which we have subnetted into internal networks similar to 10.1.2.x,
> > 10.2.3.x and so on.  However our VPN clients use 10.1.20.x/24.
> >
> > Whenever a VPN Client registers itself in DNS after connecting, I get an
> > ET POLICY DNS Update From External net  (Gen 1 Sig 2009702)
> >
> > The rule triggers, for example, with a source of 10.10.20.10 and a
> > destination of 10.1.2.3
> >
> > I can suppress this, but am mostly wondering if anyone has any insight
> > into why the VPN is not being considered part of HOMENET.
> >
> > Thanks,
> > Sam
> >
> >
> >
> >
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