Re: send flex-resp through interface which has no ip-address!?

[G Ramon Gomez <gene () gomezbrothers com>]

Hiya Elmar,
I had to solve this issue yesterday.  Well, maybe not solve, but I got a 
funky work-around going.
The way I got it working was by assigning an IP that was invalid for the 
network to the previously IP-less interface (I essentially told the OS 
that the CIDR net was a little larger than it really was, then assigned 
an IP just outside of the legal range for that network to the 
interface), then adding an entry for the network's default gateway to 
the routing table.
This isn't perfect; hosts within my "expanded" CIDR net, but that are 
actually remote, will never get RSTs, but it has the benefit of snort 
still being somewhat transparent to scans (at least remotely), and 
getting those RSTs where they need to go.

- Ramon

Elmar Bschorer wrote:

> how can i manage, that snort sends felxible resps through e.g. eth0
> which has no ip-address assigned!?
>  


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