[Snort-users] Snort will not detect anything on stealth interface unless I assign IP

Matt Kettler mkettler at ...4108...
Sat Jul 17 13:49:08 EDT 2004

At 03:10 PM 7/17/2004, Rhugga wrote:
>I have attached 1 interface of from ISD box a hub containing our border 
>router and our 2 firewalls. I bring the interface up with no IP address 
>and snort will not start due to $eth1_ADDRESS being null.

What are you using $eth1_address for? your HOME_NET?

if you set the eth1 interface to an invalid dummy address, and then try to 
use that dummy address for HOME_NET, of course no rules will match, because 
none of the traffic on your wire is in HOME_NET.

Edit your snort.conf to not use the interface address macros when doing 
stealth interfaces.

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