Re: disable spp_portscan2

[Erek Adams <erek () snort org>]

On Tue, 18 Mar 2003, John Sage wrote:

> Erek, et al:
>
> Looking at his syntax for eth0_ADDRESS, HOME_NET, and EXTERNAL_NET,
> and wondering:
>
> 1) what it's intended to do;
>
> 2) will it work?

[...snip...]

> > var eth0_ADDRESS localhost.localdomain
> > var HOME_NET $eth0_ADDRESS
> >
> > var EXTERNAL_NET $HOME_NET

[...snip...]

This is just Not A Good Thing(tm).

Make life simple:

        var HOME_NET $eth0_ADDRESS
        var EXTERNAL_NET !$HOME_NET

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

Is a bit cleaner and easier to follow, IMHO.

Cheers!

-----
Erek Adams

   "When things get weird, the weird turn pro."   H.S. Thompson


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