[Snort-users] Snort.conf variables

Remus rmocius at ...2161...
Tue Nov 11 00:12:02 EST 2003


Snort is running on eth0 (external NIC)
I use NAT with only C class IPs for local network.
>> What are HOME_NET and EXTERNAL_NET defined as relative to your network? -
Sorry what you mean?
And I want to pick up inbound attacks and outbound attacks on eth0.




----- Original Message ----- 
From: "Matt Kettler" <mkettler at ...4108...>
To: "Remus" <rmocius at ...2161...>; <snort-users at lists.sourceforge.net>
Sent: Monday, November 10, 2003 11:08 PM
Subject: Re: [Snort-users] Snort.conf variables

> At 11:16 AM 11/10/2003, Remus wrote:
> >Just my small confusion regarding HOME_NET and EXTERNAL_NET variables.
> >
> >I have a Linux firewall which one runs Snort as well:
> >
> >eth0 - external network
> >eth1 - local network
> >
> >And it has port forwards to web, smtp servers in the local network.
> >
> >Now my question is which one variables I have to use for my eth0 and
> Given your question, there's no possible answer. And quite frankly, the
> real answer may be "neither".  Snort configuration depends on a lot more
> than just what your router interfaces are.
> What interface is snort running on, eth0 or eth1?
> Is there address translation going on?
> What are HOME_NET and EXTERNAL_NET defined as relative to your network?
> Are you looking to pick up inbound attacks, outbound attacks, or both?
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