[Snort-devel] Active response on two interfaces

Russ Combs rcombs at ...402...
Wed May 9 00:57:30 EDT 2012


What version of Snort and DAQ are you using?  Snort has a check to prevent
RST to RST.

On Tue, May 1, 2012 at 7:46 PM, Jon Larson <jlarson at ...3287...> wrote:

> I/we need to get snort to operate on two interfaces.  For simplicity,
> let's just say I want to have snort monitor traffic on eth0, but then
> send its resets out on eth1.  What's the configuration magic to allow this?
>
> I've tried something like this in the snort.conf:
> config response: device eth1 attempts 2
>
> This, however, seems to get snort into this mode (when it detects some
> TCP connection it's configured to reset) where it "sniffs" back in the
> RST packet (on the other interface), then sends another RST packet.
> Kinda like "eating it's own tail".  The snort process consumes the CPU
> and floods the network in this mode.
>
> Also is there documentation someone could point me to regarding
> configuring snort for multiple interfaces?
>
> Any and all information would be greatly appreciated!
> Jonny L.
>
>
>
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