Re: Active response... some thoughts.

["Thomas H. Ptacek" <tqbf () pobox com>]

On 1/31/03 1:22 PM, "Chris Travers" <chris () travelamericas com> wrote:

> An IDS could have hooks into a routers filtering tables in order to
> temporarily ban that IP address.  This has the advantage of the RST in
> that all inbound traffic from the attacker would be stopped, but would

ACL countermeasures are generally avoided because it is hard to make them
fail safely. It is not easy to push soft-state ACLs to Cisco and Juniper
routers; the risk that the IDS could get desynchronized from the filter is
large.