On Thu, 8 Oct 2009 11:46:09 -0400
Brad Tilley <b...@16systems.com> wrote:

> On Thu, Oct 8, 2009 at 10:57 AM, Joachim Schipper
> <joac...@joachimschipper.nl> wrote:
> 
> > There is no support for the "queue packets to userspace" required by
> > Snort's IPS mode in any released OpenBSD version...
> 
> I have never seen Snort deployed in IPS mode, only IDS mode for
> monitoring purposes. IMO, too many things break in IPS mode. The old
> ISS systems from IBM did "virtual patching" when in IPS mode. It
> basically altered the packets before sending them to the dest. You can
> imagine the stuff that broke.

I have setup several IPS-systems for companies and I have nothing to
complain. Those work as good as IDS-systems and you get more out of the
system. Of course there are very good reasons to use IDS in some cases.
The best setup is to have fail-open network-cards. <ad>If one is
interested in some highend-hardware one should look at Sourcefire 3D
sensors</ad>, but of course those aren't cheap, which sucks.

---
Henri Salo

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